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        <a href="killerbee-module.html">Package&nbsp;killerbee</a> ::
        Module&nbsp;dot154decode
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<h1 class="epydoc">Source Code for <a href="killerbee.dot154decode-module.html">Module killerbee.dot154decode</a></h1>
<pre class="py-src">
<a name="L1"></a><tt class="py-lineno">  1</tt>  <tt class="py-line"><tt class="py-keyword">import</tt> <tt class="py-name">struct</tt> </tt>
<a name="L2"></a><tt class="py-lineno">  2</tt>  <tt class="py-line"><tt class="py-keyword">from</tt> <tt class="py-name">Crypto</tt><tt class="py-op">.</tt><tt class="py-name">Cipher</tt> <tt class="py-keyword">import</tt> <tt class="py-name">AES</tt> </tt>
<a name="L3"></a><tt class="py-lineno">  3</tt>  <tt class="py-line"> </tt>
<a name="L4"></a><tt class="py-lineno">  4</tt>  <tt class="py-line"> </tt>
<a name="L5"></a><tt class="py-lineno">  5</tt>  <tt class="py-line"><tt class="py-comment">## Constants for packet decoding fields</tt> </tt>
<a name="L6"></a><tt class="py-lineno">  6</tt>  <tt class="py-line"><tt class="py-comment"># Frame Control Field</tt> </tt>
<a name="L7"></a><tt class="py-lineno">  7</tt>  <tt class="py-line"><tt id="link-0" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_TYPE_MASK=killerbee.dot154decode-module.html#DOT154_FCF_TYPE_MASK"><a title="killerbee.dot154decode.DOT154_FCF_TYPE_MASK" class="py-name" href="#" onclick="return doclink('link-0', 'DOT154_FCF_TYPE_MASK', 'link-0');">DOT154_FCF_TYPE_MASK</a></tt>            <tt class="py-op">=</tt> <tt class="py-number">0x0007</tt>  <tt class="py-comment">#: Frame type mask</tt> </tt>
<a name="L8"></a><tt class="py-lineno">  8</tt>  <tt class="py-line"><tt id="link-1" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_SEC_EN=killerbee.dot154decode-module.html#DOT154_FCF_SEC_EN"><a title="killerbee.dot154decode.DOT154_FCF_SEC_EN" class="py-name" href="#" onclick="return doclink('link-1', 'DOT154_FCF_SEC_EN', 'link-1');">DOT154_FCF_SEC_EN</a></tt>               <tt class="py-op">=</tt> <tt class="py-number">0x0008</tt>  <tt class="py-comment">#: Set for encrypted payload</tt> </tt>
<a name="L9"></a><tt class="py-lineno">  9</tt>  <tt class="py-line"><tt id="link-2" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_FRAME_PND=killerbee.dot154decode-module.html#DOT154_FCF_FRAME_PND"><a title="killerbee.dot154decode.DOT154_FCF_FRAME_PND" class="py-name" href="#" onclick="return doclink('link-2', 'DOT154_FCF_FRAME_PND', 'link-2');">DOT154_FCF_FRAME_PND</a></tt>            <tt class="py-op">=</tt> <tt class="py-number">0x0010</tt>  <tt class="py-comment">#: Frame pending</tt> </tt>
<a name="L10"></a><tt class="py-lineno"> 10</tt>  <tt class="py-line"><tt id="link-3" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_ACK_REQ=killerbee.dot154decode-module.html#DOT154_FCF_ACK_REQ"><a title="killerbee.dot154decode.DOT154_FCF_ACK_REQ" class="py-name" href="#" onclick="return doclink('link-3', 'DOT154_FCF_ACK_REQ', 'link-3');">DOT154_FCF_ACK_REQ</a></tt>              <tt class="py-op">=</tt> <tt class="py-number">0x0020</tt>  <tt class="py-comment">#: ACK request</tt> </tt>
<a name="L11"></a><tt class="py-lineno"> 11</tt>  <tt class="py-line"><tt id="link-4" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_INTRA_PAN=killerbee.dot154decode-module.html#DOT154_FCF_INTRA_PAN"><a title="killerbee.dot154decode.DOT154_FCF_INTRA_PAN" class="py-name" href="#" onclick="return doclink('link-4', 'DOT154_FCF_INTRA_PAN', 'link-4');">DOT154_FCF_INTRA_PAN</a></tt>            <tt class="py-op">=</tt> <tt class="py-number">0x0040</tt>  <tt class="py-comment">#: Intra-PAN activity</tt> </tt>
<a name="L12"></a><tt class="py-lineno"> 12</tt>  <tt class="py-line"><tt id="link-5" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_DADDR_MASK=killerbee.dot154decode-module.html#DOT154_FCF_DADDR_MASK"><a title="killerbee.dot154decode.DOT154_FCF_DADDR_MASK" class="py-name" href="#" onclick="return doclink('link-5', 'DOT154_FCF_DADDR_MASK', 'link-5');">DOT154_FCF_DADDR_MASK</a></tt>           <tt class="py-op">=</tt> <tt class="py-number">0x0C00</tt>  <tt class="py-comment">#: Destination addressing mode mask</tt> </tt>
<a name="L13"></a><tt class="py-lineno"> 13</tt>  <tt class="py-line"><tt id="link-6" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_VERSION_MASK=killerbee.dot154decode-module.html#DOT154_FCF_VERSION_MASK"><a title="killerbee.dot154decode.DOT154_FCF_VERSION_MASK" class="py-name" href="#" onclick="return doclink('link-6', 'DOT154_FCF_VERSION_MASK', 'link-6');">DOT154_FCF_VERSION_MASK</a></tt>         <tt class="py-op">=</tt> <tt class="py-number">0x3000</tt>  <tt class="py-comment">#: Frame version</tt> </tt>
<a name="L14"></a><tt class="py-lineno"> 14</tt>  <tt class="py-line"><tt id="link-7" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_SADDR_MASK=killerbee.dot154decode-module.html#DOT154_FCF_SADDR_MASK"><a title="killerbee.dot154decode.DOT154_FCF_SADDR_MASK" class="py-name" href="#" onclick="return doclink('link-7', 'DOT154_FCF_SADDR_MASK', 'link-7');">DOT154_FCF_SADDR_MASK</a></tt>           <tt class="py-op">=</tt> <tt class="py-number">0xC000</tt>  <tt class="py-comment">#: Source addressing mask mode</tt> </tt>
<a name="L15"></a><tt class="py-lineno"> 15</tt>  <tt class="py-line"> </tt>
<a name="L16"></a><tt class="py-lineno"> 16</tt>  <tt class="py-line"><tt class="py-comment"># Frame Control Field Bit Shifts</tt> </tt>
<a name="L17"></a><tt class="py-lineno"> 17</tt>  <tt class="py-line"><tt id="link-8" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_TYPE_MASK_SHIFT=killerbee.dot154decode-module.html#DOT154_FCF_TYPE_MASK_SHIFT"><a title="killerbee.dot154decode.DOT154_FCF_TYPE_MASK_SHIFT" class="py-name" href="#" onclick="return doclink('link-8', 'DOT154_FCF_TYPE_MASK_SHIFT', 'link-8');">DOT154_FCF_TYPE_MASK_SHIFT</a></tt>      <tt class="py-op">=</tt> <tt class="py-number">0</tt>  <tt class="py-comment">#: Frame type mask mode shift</tt> </tt>
<a name="L18"></a><tt class="py-lineno"> 18</tt>  <tt class="py-line"><tt id="link-9" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_DADDR_MASK_SHIFT=killerbee.dot154decode-module.html#DOT154_FCF_DADDR_MASK_SHIFT"><a title="killerbee.dot154decode.DOT154_FCF_DADDR_MASK_SHIFT" class="py-name" href="#" onclick="return doclink('link-9', 'DOT154_FCF_DADDR_MASK_SHIFT', 'link-9');">DOT154_FCF_DADDR_MASK_SHIFT</a></tt>     <tt class="py-op">=</tt> <tt class="py-number">10</tt>  <tt class="py-comment">#: Destination addressing mode mask</tt> </tt>
<a name="L19"></a><tt class="py-lineno"> 19</tt>  <tt class="py-line"><tt id="link-10" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_VERSION_MASK_SHIFT=killerbee.dot154decode-module.html#DOT154_FCF_VERSION_MASK_SHIFT"><a title="killerbee.dot154decode.DOT154_FCF_VERSION_MASK_SHIFT" class="py-name" href="#" onclick="return doclink('link-10', 'DOT154_FCF_VERSION_MASK_SHIFT', 'link-10');">DOT154_FCF_VERSION_MASK_SHIFT</a></tt>   <tt class="py-op">=</tt> <tt class="py-number">12</tt>  <tt class="py-comment">#: Frame versions mask mode shift</tt> </tt>
<a name="L20"></a><tt class="py-lineno"> 20</tt>  <tt class="py-line"><tt id="link-11" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_SADDR_MASK_SHIFT=killerbee.dot154decode-module.html#DOT154_FCF_SADDR_MASK_SHIFT"><a title="killerbee.dot154decode.DOT154_FCF_SADDR_MASK_SHIFT" class="py-name" href="#" onclick="return doclink('link-11', 'DOT154_FCF_SADDR_MASK_SHIFT', 'link-11');">DOT154_FCF_SADDR_MASK_SHIFT</a></tt>     <tt class="py-op">=</tt> <tt class="py-number">14</tt>  <tt class="py-comment">#: Source addressing mask mode shift</tt> </tt>
<a name="L21"></a><tt class="py-lineno"> 21</tt>  <tt class="py-line"> </tt>
<a name="L22"></a><tt class="py-lineno"> 22</tt>  <tt class="py-line"><tt class="py-comment"># Address Mode Definitions</tt> </tt>
<a name="L23"></a><tt class="py-lineno"> 23</tt>  <tt class="py-line"><tt id="link-12" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_ADDR_NONE=killerbee.dot154decode-module.html#DOT154_FCF_ADDR_NONE"><a title="killerbee.dot154decode.DOT154_FCF_ADDR_NONE" class="py-name" href="#" onclick="return doclink('link-12', 'DOT154_FCF_ADDR_NONE', 'link-12');">DOT154_FCF_ADDR_NONE</a></tt>            <tt class="py-op">=</tt> <tt class="py-number">0x0000</tt>  <tt class="py-comment">#: Not sure when this is used</tt> </tt>
<a name="L24"></a><tt class="py-lineno"> 24</tt>  <tt class="py-line"><tt id="link-13" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_ADDR_SHORT=killerbee.dot154decode-module.html#DOT154_FCF_ADDR_SHORT"><a title="killerbee.dot154decode.DOT154_FCF_ADDR_SHORT" class="py-name" href="#" onclick="return doclink('link-13', 'DOT154_FCF_ADDR_SHORT', 'link-13');">DOT154_FCF_ADDR_SHORT</a></tt>           <tt class="py-op">=</tt> <tt class="py-number">0x0002</tt>  <tt class="py-comment">#: 4-byte addressing</tt> </tt>
<a name="L25"></a><tt class="py-lineno"> 25</tt>  <tt class="py-line"><tt id="link-14" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_ADDR_EXT=killerbee.dot154decode-module.html#DOT154_FCF_ADDR_EXT"><a title="killerbee.dot154decode.DOT154_FCF_ADDR_EXT" class="py-name" href="#" onclick="return doclink('link-14', 'DOT154_FCF_ADDR_EXT', 'link-14');">DOT154_FCF_ADDR_EXT</a></tt>             <tt class="py-op">=</tt> <tt class="py-number">0x0003</tt>  <tt class="py-comment">#: 8-byte addressing</tt> </tt>
<a name="L26"></a><tt class="py-lineno"> 26</tt>  <tt class="py-line"> </tt>
<a name="L27"></a><tt class="py-lineno"> 27</tt>  <tt class="py-line"><tt id="link-15" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_TYPE_BEACON=killerbee.dot154decode-module.html#DOT154_FCF_TYPE_BEACON"><a title="killerbee.dot154decode.DOT154_FCF_TYPE_BEACON" class="py-name" href="#" onclick="return doclink('link-15', 'DOT154_FCF_TYPE_BEACON', 'link-15');">DOT154_FCF_TYPE_BEACON</a></tt>          <tt class="py-op">=</tt> <tt class="py-number">0</tt>     <tt class="py-comment">#: Beacon frame</tt> </tt>
<a name="L28"></a><tt class="py-lineno"> 28</tt>  <tt class="py-line"><tt id="link-16" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_TYPE_DATA=killerbee.dot154decode-module.html#DOT154_FCF_TYPE_DATA"><a title="killerbee.dot154decode.DOT154_FCF_TYPE_DATA" class="py-name" href="#" onclick="return doclink('link-16', 'DOT154_FCF_TYPE_DATA', 'link-16');">DOT154_FCF_TYPE_DATA</a></tt>            <tt class="py-op">=</tt> <tt class="py-number">1</tt>     <tt class="py-comment">#: Data frame</tt> </tt>
<a name="L29"></a><tt class="py-lineno"> 29</tt>  <tt class="py-line"><tt id="link-17" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_TYPE_ACK=killerbee.dot154decode-module.html#DOT154_FCF_TYPE_ACK"><a title="killerbee.dot154decode.DOT154_FCF_TYPE_ACK" class="py-name" href="#" onclick="return doclink('link-17', 'DOT154_FCF_TYPE_ACK', 'link-17');">DOT154_FCF_TYPE_ACK</a></tt>             <tt class="py-op">=</tt> <tt class="py-number">2</tt>     <tt class="py-comment">#: Acknowledgement frame</tt> </tt>
<a name="L30"></a><tt class="py-lineno"> 30</tt>  <tt class="py-line"><tt id="link-18" class="py-name" targets="Variable killerbee.dot154decode.DOT154_FCF_TYPE_MACCMD=killerbee.dot154decode-module.html#DOT154_FCF_TYPE_MACCMD"><a title="killerbee.dot154decode.DOT154_FCF_TYPE_MACCMD" class="py-name" href="#" onclick="return doclink('link-18', 'DOT154_FCF_TYPE_MACCMD', 'link-18');">DOT154_FCF_TYPE_MACCMD</a></tt>          <tt class="py-op">=</tt> <tt class="py-number">3</tt>     <tt class="py-comment">#: MAC Command frame</tt> </tt>
<a name="L31"></a><tt class="py-lineno"> 31</tt>  <tt class="py-line"> </tt>
<a name="L32"></a><tt class="py-lineno"> 32</tt>  <tt class="py-line"><tt id="link-19" class="py-name" targets="Variable killerbee.dot154decode.DOT154_CRYPT_NONE=killerbee.dot154decode-module.html#DOT154_CRYPT_NONE"><a title="killerbee.dot154decode.DOT154_CRYPT_NONE" class="py-name" href="#" onclick="return doclink('link-19', 'DOT154_CRYPT_NONE', 'link-19');">DOT154_CRYPT_NONE</a></tt>               <tt class="py-op">=</tt> <tt class="py-number">0x00</tt>    <tt class="py-comment">#: No encryption, no MIC</tt> </tt>
<a name="L33"></a><tt class="py-lineno"> 33</tt>  <tt class="py-line"><tt id="link-20" class="py-name" targets="Variable killerbee.dot154decode.DOT154_CRYPT_MIC32=killerbee.dot154decode-module.html#DOT154_CRYPT_MIC32"><a title="killerbee.dot154decode.DOT154_CRYPT_MIC32" class="py-name" href="#" onclick="return doclink('link-20', 'DOT154_CRYPT_MIC32', 'link-20');">DOT154_CRYPT_MIC32</a></tt>              <tt class="py-op">=</tt> <tt class="py-number">0x01</tt>    <tt class="py-comment">#: No encryption, 32-bit MIC</tt> </tt>
<a name="L34"></a><tt class="py-lineno"> 34</tt>  <tt class="py-line"><tt id="link-21" class="py-name" targets="Variable killerbee.dot154decode.DOT154_CRYPT_MIC64=killerbee.dot154decode-module.html#DOT154_CRYPT_MIC64"><a title="killerbee.dot154decode.DOT154_CRYPT_MIC64" class="py-name" href="#" onclick="return doclink('link-21', 'DOT154_CRYPT_MIC64', 'link-21');">DOT154_CRYPT_MIC64</a></tt>              <tt class="py-op">=</tt> <tt class="py-number">0x02</tt>    <tt class="py-comment">#: No encryption, 64-bit MIC</tt> </tt>
<a name="L35"></a><tt class="py-lineno"> 35</tt>  <tt class="py-line"><tt id="link-22" class="py-name" targets="Variable killerbee.dot154decode.DOT154_CRYPT_MIC128=killerbee.dot154decode-module.html#DOT154_CRYPT_MIC128"><a title="killerbee.dot154decode.DOT154_CRYPT_MIC128" class="py-name" href="#" onclick="return doclink('link-22', 'DOT154_CRYPT_MIC128', 'link-22');">DOT154_CRYPT_MIC128</a></tt>             <tt class="py-op">=</tt> <tt class="py-number">0x03</tt>    <tt class="py-comment">#: No encryption, 128-bit MIC</tt> </tt>
<a name="L36"></a><tt class="py-lineno"> 36</tt>  <tt class="py-line"><tt id="link-23" class="py-name" targets="Variable killerbee.dot154decode.DOT154_CRYPT_ENC=killerbee.dot154decode-module.html#DOT154_CRYPT_ENC"><a title="killerbee.dot154decode.DOT154_CRYPT_ENC" class="py-name" href="#" onclick="return doclink('link-23', 'DOT154_CRYPT_ENC', 'link-23');">DOT154_CRYPT_ENC</a></tt>                <tt class="py-op">=</tt> <tt class="py-number">0x04</tt>    <tt class="py-comment">#: Encryption, no MIC</tt> </tt>
<a name="L37"></a><tt class="py-lineno"> 37</tt>  <tt class="py-line"><tt id="link-24" class="py-name" targets="Variable killerbee.dot154decode.DOT154_CRYPT_ENC_MIC32=killerbee.dot154decode-module.html#DOT154_CRYPT_ENC_MIC32"><a title="killerbee.dot154decode.DOT154_CRYPT_ENC_MIC32" class="py-name" href="#" onclick="return doclink('link-24', 'DOT154_CRYPT_ENC_MIC32', 'link-24');">DOT154_CRYPT_ENC_MIC32</a></tt>          <tt class="py-op">=</tt> <tt class="py-number">0x05</tt>    <tt class="py-comment">#: Encryption, 32-bit MIC</tt> </tt>
<a name="L38"></a><tt class="py-lineno"> 38</tt>  <tt class="py-line"><tt id="link-25" class="py-name" targets="Variable killerbee.dot154decode.DOT154_CRYPT_ENC_MIC64=killerbee.dot154decode-module.html#DOT154_CRYPT_ENC_MIC64"><a title="killerbee.dot154decode.DOT154_CRYPT_ENC_MIC64" class="py-name" href="#" onclick="return doclink('link-25', 'DOT154_CRYPT_ENC_MIC64', 'link-25');">DOT154_CRYPT_ENC_MIC64</a></tt>          <tt class="py-op">=</tt> <tt class="py-number">0x06</tt>    <tt class="py-comment">#: Encryption, 64-bit MIC</tt> </tt>
<a name="L39"></a><tt class="py-lineno"> 39</tt>  <tt class="py-line"><tt id="link-26" class="py-name" targets="Variable killerbee.dot154decode.DOT154_CRYPT_ENC_MIC128=killerbee.dot154decode-module.html#DOT154_CRYPT_ENC_MIC128"><a title="killerbee.dot154decode.DOT154_CRYPT_ENC_MIC128" class="py-name" href="#" onclick="return doclink('link-26', 'DOT154_CRYPT_ENC_MIC128', 'link-26');">DOT154_CRYPT_ENC_MIC128</a></tt>         <tt class="py-op">=</tt> <tt class="py-number">0x07</tt>    <tt class="py-comment">#: Encryption, 128-bit MIC</tt> </tt>
<a name="L40"></a><tt class="py-lineno"> 40</tt>  <tt class="py-line"> </tt>
<a name="Dot154PacketParser"></a><div id="Dot154PacketParser-def"><a name="L41"></a><tt class="py-lineno"> 41</tt> <a class="py-toggle" href="#" id="Dot154PacketParser-toggle" onclick="return toggle('Dot154PacketParser');">-</a><tt class="py-line"><tt class="py-keyword">class</tt> <a class="py-def-name" href="killerbee.dot154decode.Dot154PacketParser-class.html">Dot154PacketParser</a><tt class="py-op">:</tt> </tt>
</div><div id="Dot154PacketParser-collapsed" style="display:none;" pad="+++" indent="++++"></div><div id="Dot154PacketParser-expanded"><a name="Dot154PacketParser.__init__"></a><div id="Dot154PacketParser.__init__-def"><a name="L42"></a><tt class="py-lineno"> 42</tt> <a class="py-toggle" href="#" id="Dot154PacketParser.__init__-toggle" onclick="return toggle('Dot154PacketParser.__init__');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="killerbee.dot154decode.Dot154PacketParser-class.html#__init__">__init__</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="Dot154PacketParser.__init__-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Dot154PacketParser.__init__-expanded"><a name="L43"></a><tt class="py-lineno"> 43</tt>  <tt class="py-line">        <tt class="py-docstring">'''</tt> </tt>
<a name="L44"></a><tt class="py-lineno"> 44</tt>  <tt class="py-line"><tt class="py-docstring">        Instantiates the Dot154PacketParser class.</tt> </tt>
<a name="L45"></a><tt class="py-lineno"> 45</tt>  <tt class="py-line"><tt class="py-docstring">        '''</tt> </tt>
<a name="L46"></a><tt class="py-lineno"> 46</tt>  <tt class="py-line"> </tt>
<a name="L47"></a><tt class="py-lineno"> 47</tt>  <tt class="py-line">        <tt class="py-comment"># State values for AES-CTR mode</tt> </tt>
<a name="L48"></a><tt class="py-lineno"> 48</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">__crypt_blockcntr</tt> <tt class="py-op">=</tt> <tt class="py-number">1</tt> </tt>
<a name="L49"></a><tt class="py-lineno"> 49</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">__crypt_A_i</tt> <tt class="py-op">=</tt> <tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
<a name="L50"></a><tt class="py-lineno"> 50</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> </tt>
</div><a name="L51"></a><tt class="py-lineno"> 51</tt>  <tt class="py-line"> </tt>
<a name="Dot154PacketParser.__crypt_counter"></a><div id="Dot154PacketParser.__crypt_counter-def"><a name="L52"></a><tt class="py-lineno"> 52</tt> <a class="py-toggle" href="#" id="Dot154PacketParser.__crypt_counter-toggle" onclick="return toggle('Dot154PacketParser.__crypt_counter');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="killerbee.dot154decode.Dot154PacketParser-class.html#__crypt_counter">__crypt_counter</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="Dot154PacketParser.__crypt_counter-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Dot154PacketParser.__crypt_counter-expanded"><a name="L53"></a><tt class="py-lineno"> 53</tt>  <tt class="py-line">        <tt class="py-docstring">'''</tt> </tt>
<a name="L54"></a><tt class="py-lineno"> 54</tt>  <tt class="py-line"><tt class="py-docstring">        Used for AES-CTR mode after populating self.__crypt_A_i</tt> </tt>
<a name="L55"></a><tt class="py-lineno"> 55</tt>  <tt class="py-line"><tt class="py-docstring">        Don't call this directly.  Just don't.</tt> </tt>
<a name="L56"></a><tt class="py-lineno"> 56</tt>  <tt class="py-line"><tt class="py-docstring">        '''</tt> </tt>
<a name="L57"></a><tt class="py-lineno"> 57</tt>  <tt class="py-line">        <tt class="py-name">retindex</tt> <tt class="py-op">=</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">__crypt_blockcntr</tt> </tt>
<a name="L58"></a><tt class="py-lineno"> 58</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">__crypt_blockcntr</tt> <tt class="py-op">+=</tt> <tt class="py-number">1</tt> </tt>
<a name="L59"></a><tt class="py-lineno"> 59</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">__crypt_A_i</tt><tt class="py-op">[</tt><tt class="py-name">retindex</tt><tt class="py-op">]</tt> </tt>
</div><a name="L60"></a><tt class="py-lineno"> 60</tt>  <tt class="py-line"> </tt>
<a name="Dot154PacketParser.decrypt"></a><div id="Dot154PacketParser.decrypt-def"><a name="L61"></a><tt class="py-lineno"> 61</tt> <a class="py-toggle" href="#" id="Dot154PacketParser.decrypt-toggle" onclick="return toggle('Dot154PacketParser.decrypt');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="killerbee.dot154decode.Dot154PacketParser-class.html#decrypt">decrypt</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">packet</tt><tt class="py-op">,</tt> <tt class="py-param">key</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="Dot154PacketParser.decrypt-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Dot154PacketParser.decrypt-expanded"><a name="L62"></a><tt class="py-lineno"> 62</tt>  <tt class="py-line">        <tt class="py-docstring">'''</tt> </tt>
<a name="L63"></a><tt class="py-lineno"> 63</tt>  <tt class="py-line"><tt class="py-docstring">        Decrypts the specified packet. Returns empty string if the packet is</tt> </tt>
<a name="L64"></a><tt class="py-lineno"> 64</tt>  <tt class="py-line"><tt class="py-docstring">        not encrypted, or if decryption MIC validation fails.</tt> </tt>
<a name="L65"></a><tt class="py-lineno"> 65</tt>  <tt class="py-line"><tt class="py-docstring">        </tt> </tt>
<a name="L66"></a><tt class="py-lineno"> 66</tt>  <tt class="py-line"><tt class="py-docstring">        @type packet: String</tt> </tt>
<a name="L67"></a><tt class="py-lineno"> 67</tt>  <tt class="py-line"><tt class="py-docstring">        @param packet: Packet contents.</tt> </tt>
<a name="L68"></a><tt class="py-lineno"> 68</tt>  <tt class="py-line"><tt class="py-docstring">        @type key: String</tt> </tt>
<a name="L69"></a><tt class="py-lineno"> 69</tt>  <tt class="py-line"><tt class="py-docstring">        @param key: Key contents.</tt> </tt>
<a name="L70"></a><tt class="py-lineno"> 70</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype: String</tt> </tt>
<a name="L71"></a><tt class="py-lineno"> 71</tt>  <tt class="py-line"><tt class="py-docstring">        @return: Decrypted packet contents, empty string if not encrypted or if</tt> </tt>
<a name="L72"></a><tt class="py-lineno"> 72</tt>  <tt class="py-line"><tt class="py-docstring">        decryped MIC fails validation.</tt> </tt>
<a name="L73"></a><tt class="py-lineno"> 73</tt>  <tt class="py-line"><tt class="py-docstring">        '''</tt> </tt>
<a name="L74"></a><tt class="py-lineno"> 74</tt>  <tt class="py-line"> </tt>
<a name="L75"></a><tt class="py-lineno"> 75</tt>  <tt class="py-line">        <tt class="py-comment"># Retrieve the data payload from the packet contents</tt> </tt>
<a name="L76"></a><tt class="py-lineno"> 76</tt>  <tt class="py-line">        <tt class="py-name">encpayload</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-op">-</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-27" class="py-name" targets="Method killerbee.dot154decode.Dot154PacketParser.payloadlen()=killerbee.dot154decode.Dot154PacketParser-class.html#payloadlen,Method killerbee.zigbeedecode.ZigBeeAPSPacketParser.payloadlen()=killerbee.zigbeedecode.ZigBeeAPSPacketParser-class.html#payloadlen,Method killerbee.zigbeedecode.ZigBeeNWKPacketParser.payloadlen()=killerbee.zigbeedecode.ZigBeeNWKPacketParser-class.html#payloadlen"><a title="killerbee.dot154decode.Dot154PacketParser.payloadlen
killerbee.zigbeedecode.ZigBeeAPSPacketParser.payloadlen
killerbee.zigbeedecode.ZigBeeNWKPacketParser.payloadlen" class="py-name" href="#" onclick="return doclink('link-27', 'payloadlen', 'link-27');">payloadlen</a></tt><tt class="py-op">(</tt><tt class="py-name">packet</tt><tt class="py-op">)</tt><tt class="py-op">:</tt><tt class="py-op">]</tt> </tt>
<a name="L77"></a><tt class="py-lineno"> 77</tt>  <tt class="py-line"> </tt>
<a name="L78"></a><tt class="py-lineno"> 78</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">ord</tt><tt class="py-op">(</tt><tt class="py-name">encpayload</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> <tt class="py-op">!=</tt> <tt id="link-28" class="py-name"><a title="killerbee.dot154decode.DOT154_CRYPT_ENC_MIC64" class="py-name" href="#" onclick="return doclink('link-28', 'DOT154_CRYPT_ENC_MIC64', 'link-25');">DOT154_CRYPT_ENC_MIC64</a></tt><tt class="py-op">:</tt> </tt>
<a name="L79"></a><tt class="py-lineno"> 79</tt>  <tt class="py-line">            <tt class="py-keyword">raise</tt> <tt class="py-name">Exception</tt><tt class="py-op">(</tt><tt class="py-string">"Unsupported security level in packet: 0x%02x."</tt> <tt class="py-op">%</tt> <tt class="py-name">ord</tt><tt class="py-op">(</tt><tt class="py-name">encpayload</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L80"></a><tt class="py-lineno"> 80</tt>  <tt class="py-line"> </tt>
<a name="L81"></a><tt class="py-lineno"> 81</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">key</tt><tt class="py-op">)</tt> <tt class="py-op">!=</tt> <tt class="py-number">16</tt><tt class="py-op">:</tt> </tt>
<a name="L82"></a><tt class="py-lineno"> 82</tt>  <tt class="py-line">            <tt class="py-keyword">raise</tt> <tt class="py-name">Exception</tt><tt class="py-op">(</tt><tt class="py-string">"Invalid key length (%d)."</tt> <tt class="py-op">%</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">key</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L83"></a><tt class="py-lineno"> 83</tt>  <tt class="py-line"> </tt>
<a name="L84"></a><tt class="py-lineno"> 84</tt>  <tt class="py-line">        <tt class="py-comment"># Encrypted content is:</tt> </tt>
<a name="L85"></a><tt class="py-lineno"> 85</tt>  <tt class="py-line">        <tt class="py-comment"># Sec Level | 4-byte counter | Flags | Ciphertext | Encrypted 8-byte MIC</tt> </tt>
<a name="L86"></a><tt class="py-lineno"> 86</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-29" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.payloadlen
killerbee.zigbeedecode.ZigBeeAPSPacketParser.payloadlen
killerbee.zigbeedecode.ZigBeeNWKPacketParser.payloadlen" class="py-name" href="#" onclick="return doclink('link-29', 'payloadlen', 'link-27');">payloadlen</a></tt><tt class="py-op">(</tt><tt class="py-name">packet</tt><tt class="py-op">)</tt> <tt class="py-op">&lt;</tt> <tt class="py-number">15</tt><tt class="py-op">:</tt> </tt>
<a name="L87"></a><tt class="py-lineno"> 87</tt>  <tt class="py-line">            <tt class="py-keyword">raise</tt> <tt class="py-name">Exception</tt><tt class="py-op">(</tt><tt class="py-string">"Payload length too short (%d)."</tt> <tt class="py-op">%</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-30" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.payloadlen
killerbee.zigbeedecode.ZigBeeAPSPacketParser.payloadlen
killerbee.zigbeedecode.ZigBeeNWKPacketParser.payloadlen" class="py-name" href="#" onclick="return doclink('link-30', 'payloadlen', 'link-27');">payloadlen</a></tt><tt class="py-op">(</tt><tt class="py-name">packet</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L88"></a><tt class="py-lineno"> 88</tt>  <tt class="py-line"> </tt>
<a name="L89"></a><tt class="py-lineno"> 89</tt>  <tt class="py-line">        <tt id="link-31" class="py-name" targets="Method killerbee.dot154decode.Dot154PacketParser.nonce()=killerbee.dot154decode.Dot154PacketParser-class.html#nonce"><a title="killerbee.dot154decode.Dot154PacketParser.nonce" class="py-name" href="#" onclick="return doclink('link-31', 'nonce', 'link-31');">nonce</a></tt> <tt class="py-op">=</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-32" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.nonce" class="py-name" href="#" onclick="return doclink('link-32', 'nonce', 'link-31');">nonce</a></tt><tt class="py-op">(</tt><tt class="py-name">packet</tt><tt class="py-op">)</tt> </tt>
<a name="L90"></a><tt class="py-lineno"> 90</tt>  <tt class="py-line"> </tt>
<a name="L91"></a><tt class="py-lineno"> 91</tt>  <tt class="py-line">        <tt class="py-comment"># c = ciphertext payload including trailing 8-byte encrypted MIC</tt> </tt>
<a name="L92"></a><tt class="py-lineno"> 92</tt>  <tt class="py-line">        <tt class="py-name">c</tt> <tt class="py-op">=</tt> <tt class="py-name">encpayload</tt><tt class="py-op">[</tt><tt class="py-op">-</tt><tt class="py-number">9</tt><tt class="py-op">:</tt><tt class="py-op">]</tt> </tt>
<a name="L93"></a><tt class="py-lineno"> 93</tt>  <tt class="py-line"> </tt>
<a name="L94"></a><tt class="py-lineno"> 94</tt>  <tt class="py-line"> </tt>
<a name="L95"></a><tt class="py-lineno"> 95</tt>  <tt class="py-line">        <tt class="py-comment"># 1. Parse C||U where U is the right-most bytes for MIC and C is the</tt> </tt>
<a name="L96"></a><tt class="py-lineno"> 96</tt>  <tt class="py-line">        <tt class="py-comment">#    remaining bytes (representing encrypted packet payload content)</tt> </tt>
<a name="L97"></a><tt class="py-lineno"> 97</tt>  <tt class="py-line">        <tt class="py-name">C</tt> <tt class="py-op">=</tt> <tt class="py-name">c</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">:</tt><tt class="py-op">-</tt><tt class="py-number">8</tt><tt class="py-op">]</tt> </tt>
<a name="L98"></a><tt class="py-lineno"> 98</tt>  <tt class="py-line">        <tt class="py-name">U</tt> <tt class="py-op">=</tt> <tt class="py-name">c</tt><tt class="py-op">[</tt><tt class="py-op">-</tt><tt class="py-number">8</tt><tt class="py-op">:</tt><tt class="py-op">]</tt> </tt>
<a name="L99"></a><tt class="py-lineno"> 99</tt>  <tt class="py-line">         </tt>
<a name="L100"></a><tt class="py-lineno">100</tt>  <tt class="py-line">        <tt class="py-comment"># 2. Form cipherText by padding C to a block size</tt> </tt>
<a name="L101"></a><tt class="py-lineno">101</tt>  <tt class="py-line">        <tt class="py-name">cipherText</tt> <tt class="py-op">=</tt> <tt class="py-name">C</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-string">"\x00"</tt> <tt class="py-op">*</tt> <tt class="py-op">(</tt><tt class="py-number">16</tt> <tt class="py-op">-</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">C</tt><tt class="py-op">)</tt><tt class="py-op">%</tt><tt class="py-number">16</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L102"></a><tt class="py-lineno">102</tt>  <tt class="py-line">         </tt>
<a name="L103"></a><tt class="py-lineno">103</tt>  <tt class="py-line">        <tt class="py-comment"># 3. Form 1-byte flags field = 01 </tt> </tt>
<a name="L104"></a><tt class="py-lineno">104</tt>  <tt class="py-line">        <tt class="py-comment">#    XXX will vary when L changes</tt> </tt>
<a name="L105"></a><tt class="py-lineno">105</tt>  <tt class="py-line">        <tt class="py-name">flags</tt> <tt class="py-op">=</tt> <tt class="py-string">"\x01"</tt> </tt>
<a name="L106"></a><tt class="py-lineno">106</tt>  <tt class="py-line">         </tt>
<a name="L107"></a><tt class="py-lineno">107</tt>  <tt class="py-line">        <tt class="py-comment"># 4. Define 16-octet A_i consisting of:</tt> </tt>
<a name="L108"></a><tt class="py-lineno">108</tt>  <tt class="py-line">        <tt class="py-comment">#        Flags || Nonce || 2-byte counter i for i=0,1,2, ...</tt> </tt>
<a name="L109"></a><tt class="py-lineno">109</tt>  <tt class="py-line">        <tt class="py-comment">#    A[0] is for authenticity check, A[1] is for the first block of data,</tt> </tt>
<a name="L110"></a><tt class="py-lineno">110</tt>  <tt class="py-line">        <tt class="py-comment">#    A[2] is for the 2nd block of data, if C &gt; 16</tt> </tt>
<a name="L111"></a><tt class="py-lineno">111</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">__crypt_A_i</tt> <tt class="py-op">=</tt> <tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
<a name="L112"></a><tt class="py-lineno">112</tt>  <tt class="py-line">        <tt class="py-keyword">for</tt> <tt class="py-name">i</tt> <tt class="py-keyword">in</tt> <tt class="py-name">xrange</tt><tt class="py-op">(</tt><tt class="py-number">0</tt><tt class="py-op">,</tt> <tt class="py-op">(</tt><tt class="py-number">1</tt><tt class="py-op">+</tt><tt class="py-number">1</tt><tt class="py-op">+</tt><tt class="py-op">(</tt><tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">C</tt><tt class="py-op">)</tt><tt class="py-op">/</tt><tt class="py-number">16</tt><tt class="py-op">)</tt><tt class="py-op">)</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L113"></a><tt class="py-lineno">113</tt>  <tt class="py-line">            <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">__crypt_A_i</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-name">flags</tt> <tt class="py-op">+</tt> <tt id="link-33" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.nonce" class="py-name" href="#" onclick="return doclink('link-33', 'nonce', 'link-31');">nonce</a></tt> <tt class="py-op">+</tt> <tt class="py-name">struct</tt><tt class="py-op">.</tt><tt class="py-name">pack</tt><tt class="py-op">(</tt><tt class="py-string">"&gt;H"</tt><tt class="py-op">,</tt><tt class="py-name">i</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L114"></a><tt class="py-lineno">114</tt>  <tt class="py-line">         </tt>
<a name="L115"></a><tt class="py-lineno">115</tt>  <tt class="py-line">        <tt class="py-comment"># 5. Decrypt cipherText producing plainText (observed)</tt> </tt>
<a name="L116"></a><tt class="py-lineno">116</tt>  <tt class="py-line">        <tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">__crypt_blockcntr</tt> <tt class="py-op">=</tt> <tt class="py-number">1</tt>               <tt class="py-comment"># Start at A[1] to decrypt</tt> </tt>
<a name="L117"></a><tt class="py-lineno">117</tt>  <tt class="py-line">        <tt class="py-name">crypt</tt> <tt class="py-op">=</tt> <tt class="py-name">AES</tt><tt class="py-op">.</tt><tt class="py-name">new</tt><tt class="py-op">(</tt><tt class="py-name">key</tt><tt class="py-op">,</tt> <tt class="py-name">AES</tt><tt class="py-op">.</tt><tt class="py-name">MODE_CTR</tt><tt class="py-op">,</tt> <tt class="py-name">counter</tt><tt class="py-op">=</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-34" class="py-name" targets="Method killerbee.dot154decode.Dot154PacketParser.__crypt_counter()=killerbee.dot154decode.Dot154PacketParser-class.html#__crypt_counter"><a title="killerbee.dot154decode.Dot154PacketParser.__crypt_counter" class="py-name" href="#" onclick="return doclink('link-34', '__crypt_counter', 'link-34');">__crypt_counter</a></tt><tt class="py-op">)</tt> </tt>
<a name="L118"></a><tt class="py-lineno">118</tt>  <tt class="py-line">        <tt class="py-name">plainText</tt> <tt class="py-op">=</tt> <tt class="py-name">crypt</tt><tt class="py-op">.</tt><tt id="link-35" class="py-name" targets="Method killerbee.dot154decode.Dot154PacketParser.decrypt()=killerbee.dot154decode.Dot154PacketParser-class.html#decrypt"><a title="killerbee.dot154decode.Dot154PacketParser.decrypt" class="py-name" href="#" onclick="return doclink('link-35', 'decrypt', 'link-35');">decrypt</a></tt><tt class="py-op">(</tt><tt class="py-name">cipherText</tt><tt class="py-op">)</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">:</tt><tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">C</tt><tt class="py-op">)</tt><tt class="py-op">]</tt> </tt>
<a name="L119"></a><tt class="py-lineno">119</tt>  <tt class="py-line">         </tt>
<a name="L120"></a><tt class="py-lineno">120</tt>  <tt class="py-line">        <tt class="py-comment"># 6. Compute S_0 as E(Key, A[0])</tt> </tt>
<a name="L121"></a><tt class="py-lineno">121</tt>  <tt class="py-line">        <tt class="py-name">crypt</tt> <tt class="py-op">=</tt> <tt class="py-name">AES</tt><tt class="py-op">.</tt><tt class="py-name">new</tt><tt class="py-op">(</tt><tt class="py-name">key</tt><tt class="py-op">,</tt> <tt class="py-name">AES</tt><tt class="py-op">.</tt><tt class="py-name">MODE_CBC</tt><tt class="py-op">)</tt> </tt>
<a name="L122"></a><tt class="py-lineno">122</tt>  <tt class="py-line">        <tt class="py-name">S_0</tt> <tt class="py-op">=</tt> <tt class="py-name">crypt</tt><tt class="py-op">.</tt><tt class="py-name">encrypt</tt><tt class="py-op">(</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt class="py-name">__crypt_A_i</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> </tt>
<a name="L123"></a><tt class="py-lineno">123</tt>  <tt class="py-line">         </tt>
<a name="L124"></a><tt class="py-lineno">124</tt>  <tt class="py-line">        <tt class="py-comment"># 7. Compute MIC (T) observed as S_0 XOR U</tt> </tt>
<a name="L125"></a><tt class="py-lineno">125</tt>  <tt class="py-line">        <tt class="py-name">T_obs</tt> <tt class="py-op">=</tt> <tt class="py-op">[</tt><tt class="py-op">]</tt> </tt>
<a name="L126"></a><tt class="py-lineno">126</tt>  <tt class="py-line">        <tt class="py-keyword">for</tt> <tt class="py-name">i</tt> <tt class="py-keyword">in</tt> <tt class="py-name">xrange</tt><tt class="py-op">(</tt><tt class="py-number">0</tt><tt class="py-op">,</tt><tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">S_0</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">:</tt><tt class="py-number">8</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L127"></a><tt class="py-lineno">127</tt>  <tt class="py-line">            <tt class="py-name">T_obs</tt><tt class="py-op">.</tt><tt class="py-name">append</tt><tt class="py-op">(</tt><tt class="py-op">(</tt><tt class="py-name">ord</tt><tt class="py-op">(</tt><tt class="py-name">S_0</tt><tt class="py-op">[</tt><tt class="py-name">i</tt><tt class="py-op">]</tt><tt class="py-op">)</tt> <tt class="py-op">^</tt> <tt class="py-name">ord</tt><tt class="py-op">(</tt><tt class="py-name">U</tt><tt class="py-op">[</tt><tt class="py-name">i</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L128"></a><tt class="py-lineno">128</tt>  <tt class="py-line">         </tt>
<a name="L129"></a><tt class="py-lineno">129</tt>  <tt class="py-line">        <tt class="py-comment"># Convert T_obs back into a string (please, I need Python help)</tt> </tt>
<a name="L130"></a><tt class="py-lineno">130</tt>  <tt class="py-line">        <tt class="py-name">T_obs</tt> <tt class="py-op">=</tt> <tt class="py-string">''</tt><tt class="py-op">.</tt><tt class="py-name">join</tt><tt class="py-op">(</tt><tt class="py-name">struct</tt><tt class="py-op">.</tt><tt class="py-name">pack</tt><tt class="py-op">(</tt><tt class="py-string">"B"</tt><tt class="py-op">,</tt><tt class="py-name">i</tt><tt class="py-op">)</tt> <tt class="py-keyword">for</tt> <tt class="py-name">i</tt> <tt class="py-keyword">in</tt> <tt class="py-name">T_obs</tt><tt class="py-op">)</tt> </tt>
<a name="L131"></a><tt class="py-lineno">131</tt>  <tt class="py-line">         </tt>
<a name="L132"></a><tt class="py-lineno">132</tt>  <tt class="py-line">        <tt class="py-comment"># 8. Compute a over packet contents before ciphertext payload</tt> </tt>
<a name="L133"></a><tt class="py-lineno">133</tt>  <tt class="py-line">        <tt class="py-comment">#    This is the 802.15.4 header,plus the security level, frame</tt> </tt>
<a name="L134"></a><tt class="py-lineno">134</tt>  <tt class="py-line">        <tt class="py-comment">#    counter and flags byte (01)</tt> </tt>
<a name="L135"></a><tt class="py-lineno">135</tt>  <tt class="py-line">        <tt id="link-36" class="py-name" targets="Method killerbee.dot154decode.Dot154PacketParser.hdrlen()=killerbee.dot154decode.Dot154PacketParser-class.html#hdrlen,Method killerbee.zigbeedecode.ZigBeeAPSPacketParser.hdrlen()=killerbee.zigbeedecode.ZigBeeAPSPacketParser-class.html#hdrlen,Method killerbee.zigbeedecode.ZigBeeNWKPacketParser.hdrlen()=killerbee.zigbeedecode.ZigBeeNWKPacketParser-class.html#hdrlen"><a title="killerbee.dot154decode.Dot154PacketParser.hdrlen
killerbee.zigbeedecode.ZigBeeAPSPacketParser.hdrlen
killerbee.zigbeedecode.ZigBeeNWKPacketParser.hdrlen" class="py-name" href="#" onclick="return doclink('link-36', 'hdrlen', 'link-36');">hdrlen</a></tt> <tt class="py-op">=</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-37" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.hdrlen
killerbee.zigbeedecode.ZigBeeAPSPacketParser.hdrlen
killerbee.zigbeedecode.ZigBeeNWKPacketParser.hdrlen" class="py-name" href="#" onclick="return doclink('link-37', 'hdrlen', 'link-36');">hdrlen</a></tt><tt class="py-op">(</tt><tt class="py-name">packet</tt><tt class="py-op">)</tt> </tt>
<a name="L136"></a><tt class="py-lineno">136</tt>  <tt class="py-line">        <tt class="py-name">a</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">:</tt><tt id="link-38" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.hdrlen
killerbee.zigbeedecode.ZigBeeAPSPacketParser.hdrlen
killerbee.zigbeedecode.ZigBeeNWKPacketParser.hdrlen" class="py-name" href="#" onclick="return doclink('link-38', 'hdrlen', 'link-36');">hdrlen</a></tt><tt class="py-op">]</tt> <tt class="py-op">+</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt id="link-39" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.hdrlen
killerbee.zigbeedecode.ZigBeeAPSPacketParser.hdrlen
killerbee.zigbeedecode.ZigBeeNWKPacketParser.hdrlen" class="py-name" href="#" onclick="return doclink('link-39', 'hdrlen', 'link-36');">hdrlen</a></tt><tt class="py-op">:</tt><tt id="link-40" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.hdrlen
killerbee.zigbeedecode.ZigBeeAPSPacketParser.hdrlen
killerbee.zigbeedecode.ZigBeeNWKPacketParser.hdrlen" class="py-name" href="#" onclick="return doclink('link-40', 'hdrlen', 'link-36');">hdrlen</a></tt><tt class="py-op">+</tt><tt class="py-number">6</tt><tt class="py-op">]</tt> </tt>
<a name="L137"></a><tt class="py-lineno">137</tt>  <tt class="py-line">         </tt>
<a name="L138"></a><tt class="py-lineno">138</tt>  <tt class="py-line">        <tt class="py-comment"># 9. Concatenate L(a) of 2-byte length a with a</tt> </tt>
<a name="L139"></a><tt class="py-lineno">139</tt>  <tt class="py-line">        <tt class="py-name">addAuthData</tt> <tt class="py-op">=</tt> <tt class="py-name">struct</tt><tt class="py-op">.</tt><tt class="py-name">pack</tt><tt class="py-op">(</tt><tt class="py-string">"&gt;H"</tt><tt class="py-op">,</tt><tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">a</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> <tt class="py-op">+</tt> <tt class="py-name">a</tt> </tt>
<a name="L140"></a><tt class="py-lineno">140</tt>  <tt class="py-line">         </tt>
<a name="L141"></a><tt class="py-lineno">141</tt>  <tt class="py-line">        <tt class="py-comment"># 10. Pad addAuthData to an even block size</tt> </tt>
<a name="L142"></a><tt class="py-lineno">142</tt>  <tt class="py-line">        <tt class="py-name">addAuthData</tt> <tt class="py-op">+=</tt> <tt class="py-op">(</tt><tt class="py-string">"\x00"</tt> <tt class="py-op">*</tt> <tt class="py-op">(</tt><tt class="py-number">16</tt> <tt class="py-op">-</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">addAuthData</tt><tt class="py-op">)</tt><tt class="py-op">%</tt><tt class="py-number">16</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L143"></a><tt class="py-lineno">143</tt>  <tt class="py-line">         </tt>
<a name="L144"></a><tt class="py-lineno">144</tt>  <tt class="py-line">        <tt class="py-comment"># 11. Form AuthData by concatenating addAuthData and PlaintextData</tt> </tt>
<a name="L145"></a><tt class="py-lineno">145</tt>  <tt class="py-line">        <tt class="py-comment">#     Pad plainText to an even block size</tt> </tt>
<a name="L146"></a><tt class="py-lineno">146</tt>  <tt class="py-line">        <tt class="py-name">plainTextPadded</tt> <tt class="py-op">=</tt> <tt class="py-name">plainText</tt> <tt class="py-op">+</tt> <tt class="py-op">(</tt><tt class="py-string">"\x00"</tt> <tt class="py-op">*</tt> <tt class="py-op">(</tt><tt class="py-number">16</tt> <tt class="py-op">-</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">plainText</tt><tt class="py-op">)</tt><tt class="py-op">%</tt><tt class="py-number">16</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L147"></a><tt class="py-lineno">147</tt>  <tt class="py-line">         </tt>
<a name="L148"></a><tt class="py-lineno">148</tt>  <tt class="py-line">        <tt class="py-name">authData</tt> <tt class="py-op">=</tt> <tt class="py-name">addAuthData</tt> <tt class="py-op">+</tt> <tt class="py-name">plainTextPadded</tt> </tt>
<a name="L149"></a><tt class="py-lineno">149</tt>  <tt class="py-line">         </tt>
<a name="L150"></a><tt class="py-lineno">150</tt>  <tt class="py-line">        <tt class="py-comment"># 12. Perform authData transformation into B[0], B[1], ..., B[i]</tt> </tt>
<a name="L151"></a><tt class="py-lineno">151</tt>  <tt class="py-line">        <tt class="py-name">B</tt> <tt class="py-op">=</tt> <tt class="py-string">"\x59"</tt> <tt class="py-op">+</tt> <tt id="link-41" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.nonce" class="py-name" href="#" onclick="return doclink('link-41', 'nonce', 'link-31');">nonce</a></tt> <tt class="py-op">+</tt> <tt class="py-string">"\x00\x01"</tt> <tt class="py-op">+</tt> <tt class="py-name">authData</tt> </tt>
<a name="L152"></a><tt class="py-lineno">152</tt>  <tt class="py-line">         </tt>
<a name="L153"></a><tt class="py-lineno">153</tt>  <tt class="py-line">        <tt class="py-comment"># 13. Calculate the MIC (T) calculated with CBC-MAC</tt> </tt>
<a name="L154"></a><tt class="py-lineno">154</tt>  <tt class="py-line">        <tt class="py-name">iv</tt> <tt class="py-op">=</tt> <tt class="py-string">"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"</tt> </tt>
<a name="L155"></a><tt class="py-lineno">155</tt>  <tt class="py-line">        <tt class="py-keyword">for</tt> <tt class="py-name">i</tt> <tt class="py-keyword">in</tt> <tt class="py-name">xrange</tt><tt class="py-op">(</tt><tt class="py-number">0</tt><tt class="py-op">,</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">B</tt><tt class="py-op">)</tt><tt class="py-op">/</tt><tt class="py-number">16</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L156"></a><tt class="py-lineno">156</tt>  <tt class="py-line">            <tt class="py-name">crypt</tt> <tt class="py-op">=</tt> <tt class="py-name">AES</tt><tt class="py-op">.</tt><tt class="py-name">new</tt><tt class="py-op">(</tt><tt class="py-name">key</tt><tt class="py-op">,</tt> <tt class="py-name">AES</tt><tt class="py-op">.</tt><tt class="py-name">MODE_CBC</tt><tt class="py-op">,</tt> <tt class="py-name">iv</tt><tt class="py-op">)</tt> </tt>
<a name="L157"></a><tt class="py-lineno">157</tt>  <tt class="py-line">            <tt class="py-name">Bn</tt> <tt class="py-op">=</tt> <tt class="py-name">B</tt><tt class="py-op">[</tt><tt class="py-name">i</tt><tt class="py-op">*</tt><tt class="py-number">16</tt><tt class="py-op">:</tt><tt class="py-op">(</tt><tt class="py-name">i</tt><tt class="py-op">*</tt><tt class="py-number">16</tt><tt class="py-op">)</tt><tt class="py-op">+</tt><tt class="py-number">16</tt><tt class="py-op">]</tt> </tt>
<a name="L158"></a><tt class="py-lineno">158</tt>  <tt class="py-line">            <tt class="py-name">iv</tt> <tt class="py-op">=</tt> <tt class="py-name">crypt</tt><tt class="py-op">.</tt><tt class="py-name">encrypt</tt><tt class="py-op">(</tt><tt class="py-name">Bn</tt><tt class="py-op">)</tt> </tt>
<a name="L159"></a><tt class="py-lineno">159</tt>  <tt class="py-line">        <tt class="py-name">T_calc</tt> <tt class="py-op">=</tt> <tt class="py-name">iv</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">:</tt><tt class="py-number">8</tt><tt class="py-op">]</tt> </tt>
<a name="L160"></a><tt class="py-lineno">160</tt>  <tt class="py-line">         </tt>
<a name="L161"></a><tt class="py-lineno">161</tt>  <tt class="py-line">        <tt class="py-comment"># 14. Compare </tt> </tt>
<a name="L162"></a><tt class="py-lineno">162</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">T_obs</tt> <tt class="py-op">==</tt> <tt class="py-name">T_calc</tt><tt class="py-op">:</tt> </tt>
<a name="L163"></a><tt class="py-lineno">163</tt>  <tt class="py-line">            <tt class="py-keyword">return</tt> <tt class="py-name">plainText</tt> </tt>
<a name="L164"></a><tt class="py-lineno">164</tt>  <tt class="py-line">        <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L165"></a><tt class="py-lineno">165</tt>  <tt class="py-line">            <tt class="py-keyword">return</tt> <tt class="py-string">""</tt> </tt>
</div><a name="L166"></a><tt class="py-lineno">166</tt>  <tt class="py-line"> </tt>
<a name="L167"></a><tt class="py-lineno">167</tt>  <tt class="py-line"> </tt>
<a name="Dot154PacketParser.pktchop"></a><div id="Dot154PacketParser.pktchop-def"><a name="L168"></a><tt class="py-lineno">168</tt> <a class="py-toggle" href="#" id="Dot154PacketParser.pktchop-toggle" onclick="return toggle('Dot154PacketParser.pktchop');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="killerbee.dot154decode.Dot154PacketParser-class.html#pktchop">pktchop</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">packet</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="Dot154PacketParser.pktchop-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Dot154PacketParser.pktchop-expanded"><a name="L169"></a><tt class="py-lineno">169</tt>  <tt class="py-line">        <tt class="py-docstring">'''</tt> </tt>
<a name="L170"></a><tt class="py-lineno">170</tt>  <tt class="py-line"><tt class="py-docstring">        Chops up the specified packet contents into a list of fields.  Does</tt> </tt>
<a name="L171"></a><tt class="py-lineno">171</tt>  <tt class="py-line"><tt class="py-docstring">        not attempt to re-order the field values for parsing.  ''.join(X) will</tt> </tt>
<a name="L172"></a><tt class="py-lineno">172</tt>  <tt class="py-line"><tt class="py-docstring">        reassemble original packet string.  Fields which may or may not be</tt> </tt>
<a name="L173"></a><tt class="py-lineno">173</tt>  <tt class="py-line"><tt class="py-docstring">        present (such as the Source PAN field) are empty if they are not</tt> </tt>
<a name="L174"></a><tt class="py-lineno">174</tt>  <tt class="py-line"><tt class="py-docstring">        present, keeping the list elements consistent, as follows:</tt> </tt>
<a name="L175"></a><tt class="py-lineno">175</tt>  <tt class="py-line"><tt class="py-docstring">        FCF | Seq# | DPAN | DA | SPAN | SA | [Beacon Data] | PHY Payload</tt> </tt>
<a name="L176"></a><tt class="py-lineno">176</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L177"></a><tt class="py-lineno">177</tt>  <tt class="py-line"><tt class="py-docstring">        If the packet is a beacon frame, the Beacon Data field will be populated</tt> </tt>
<a name="L178"></a><tt class="py-lineno">178</tt>  <tt class="py-line"><tt class="py-docstring">        as a list element in the format:</tt> </tt>
<a name="L179"></a><tt class="py-lineno">179</tt>  <tt class="py-line"><tt class="py-docstring"> </tt> </tt>
<a name="L180"></a><tt class="py-lineno">180</tt>  <tt class="py-line"><tt class="py-docstring">        Superframe Spec | GTS Fields | Pending Addr Counts | Proto ID | Stack Profile/Profile Version | Device Capabilities | Ext PAN ID | TX Offset | Update ID</tt> </tt>
<a name="L181"></a><tt class="py-lineno">181</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L182"></a><tt class="py-lineno">182</tt>  <tt class="py-line"><tt class="py-docstring">        An exception is raised if the packet contents are too short to</tt> </tt>
<a name="L183"></a><tt class="py-lineno">183</tt>  <tt class="py-line"><tt class="py-docstring">        decode.</tt> </tt>
<a name="L184"></a><tt class="py-lineno">184</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
<a name="L185"></a><tt class="py-lineno">185</tt>  <tt class="py-line"><tt class="py-docstring">        @type packet: String</tt> </tt>
<a name="L186"></a><tt class="py-lineno">186</tt>  <tt class="py-line"><tt class="py-docstring">        @param packet: Packet contents.</tt> </tt>
<a name="L187"></a><tt class="py-lineno">187</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype: list</tt> </tt>
<a name="L188"></a><tt class="py-lineno">188</tt>  <tt class="py-line"><tt class="py-docstring">        @return: Chopped contents of the 802.15.4 packet into list elements.</tt> </tt>
<a name="L189"></a><tt class="py-lineno">189</tt>  <tt class="py-line"><tt class="py-docstring">        '''</tt> </tt>
<a name="L190"></a><tt class="py-lineno">190</tt>  <tt class="py-line">        <tt id="link-42" class="py-name" targets="Method killerbee.dot154decode.Dot154PacketParser.pktchop()=killerbee.dot154decode.Dot154PacketParser-class.html#pktchop,Method killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop()=killerbee.zigbeedecode.ZigBeeAPSPacketParser-class.html#pktchop,Method killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop()=killerbee.zigbeedecode.ZigBeeNWKPacketParser-class.html#pktchop"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-42', 'pktchop', 'link-42');">pktchop</a></tt> <tt class="py-op">=</tt> <tt class="py-op">[</tt><tt class="py-string">''</tt><tt class="py-op">,</tt> <tt class="py-string">''</tt><tt class="py-op">,</tt> <tt class="py-string">''</tt><tt class="py-op">,</tt> <tt class="py-string">''</tt><tt class="py-op">,</tt> <tt class="py-string">''</tt><tt class="py-op">,</tt> <tt class="py-string">''</tt><tt class="py-op">,</tt> <tt class="py-op">[</tt><tt class="py-op">]</tt><tt class="py-op">,</tt> <tt class="py-string">''</tt><tt class="py-op">]</tt> </tt>
<a name="L191"></a><tt class="py-lineno">191</tt>  <tt class="py-line"> </tt>
<a name="L192"></a><tt class="py-lineno">192</tt>  <tt class="py-line">        <tt id="link-43" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-43', 'pktchop', 'link-42');">pktchop</a></tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">:</tt><tt class="py-number">2</tt><tt class="py-op">]</tt> </tt>
<a name="L193"></a><tt class="py-lineno">193</tt>  <tt class="py-line"> </tt>
<a name="L194"></a><tt class="py-lineno">194</tt>  <tt class="py-line">        <tt class="py-comment"># Sequence number</tt> </tt>
<a name="L195"></a><tt class="py-lineno">195</tt>  <tt class="py-line">        <tt id="link-44" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-44', 'pktchop', 'link-42');">pktchop</a></tt><tt class="py-op">[</tt><tt class="py-number">1</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-number">2</tt><tt class="py-op">]</tt> </tt>
<a name="L196"></a><tt class="py-lineno">196</tt>  <tt class="py-line"> </tt>
<a name="L197"></a><tt class="py-lineno">197</tt>  <tt class="py-line">        <tt class="py-comment"># Byte swap</tt> </tt>
<a name="L198"></a><tt class="py-lineno">198</tt>  <tt class="py-line">        <tt class="py-name">fcf</tt> <tt class="py-op">=</tt> <tt class="py-name">struct</tt><tt class="py-op">.</tt><tt class="py-name">unpack</tt><tt class="py-op">(</tt><tt class="py-string">"&lt;H"</tt><tt class="py-op">,</tt><tt id="link-45" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-45', 'pktchop', 'link-42');">pktchop</a></tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt> </tt>
<a name="L199"></a><tt class="py-lineno">199</tt>  <tt class="py-line"> </tt>
<a name="L200"></a><tt class="py-lineno">200</tt>  <tt class="py-line">        <tt class="py-comment"># Check if we are dealing with a beacon frame</tt> </tt>
<a name="L201"></a><tt class="py-lineno">201</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-op">(</tt><tt class="py-name">fcf</tt> <tt class="py-op">&amp;</tt> <tt id="link-46" class="py-name"><a title="killerbee.dot154decode.DOT154_FCF_TYPE_MASK" class="py-name" href="#" onclick="return doclink('link-46', 'DOT154_FCF_TYPE_MASK', 'link-0');">DOT154_FCF_TYPE_MASK</a></tt><tt class="py-op">)</tt> <tt class="py-op">==</tt> <tt id="link-47" class="py-name"><a title="killerbee.dot154decode.DOT154_FCF_TYPE_BEACON" class="py-name" href="#" onclick="return doclink('link-47', 'DOT154_FCF_TYPE_BEACON', 'link-15');">DOT154_FCF_TYPE_BEACON</a></tt><tt class="py-op">:</tt> </tt>
<a name="L202"></a><tt class="py-lineno">202</tt>  <tt class="py-line"> </tt>
<a name="L203"></a><tt class="py-lineno">203</tt>  <tt class="py-line">            <tt class="py-name">beacondata</tt> <tt class="py-op">=</tt> <tt class="py-op">[</tt><tt class="py-string">""</tt><tt class="py-op">,</tt> <tt class="py-string">""</tt><tt class="py-op">,</tt> <tt class="py-string">""</tt><tt class="py-op">,</tt> <tt class="py-string">""</tt><tt class="py-op">,</tt> <tt class="py-string">""</tt><tt class="py-op">,</tt> <tt class="py-string">""</tt><tt class="py-op">,</tt> <tt class="py-string">""</tt><tt class="py-op">,</tt> <tt class="py-string">""</tt><tt class="py-op">,</tt> <tt class="py-string">""</tt><tt class="py-op">,</tt> <tt class="py-string">""</tt><tt class="py-op">]</tt> </tt>
<a name="L204"></a><tt class="py-lineno">204</tt>  <tt class="py-line"> </tt>
<a name="L205"></a><tt class="py-lineno">205</tt>  <tt class="py-line">            <tt class="py-keyword">try</tt><tt class="py-op">:</tt> </tt>
<a name="L206"></a><tt class="py-lineno">206</tt>  <tt class="py-line"> </tt>
<a name="L207"></a><tt class="py-lineno">207</tt>  <tt class="py-line">                <tt class="py-comment"># 802.15.4 fields, SPAN and SA</tt> </tt>
<a name="L208"></a><tt class="py-lineno">208</tt>  <tt class="py-line">                <tt id="link-48" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-48', 'pktchop', 'link-42');">pktchop</a></tt><tt class="py-op">[</tt><tt class="py-number">4</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-number">3</tt><tt class="py-op">:</tt><tt class="py-number">5</tt><tt class="py-op">]</tt> </tt>
<a name="L209"></a><tt class="py-lineno">209</tt>  <tt class="py-line">                <tt id="link-49" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-49', 'pktchop', 'link-42');">pktchop</a></tt><tt class="py-op">[</tt><tt class="py-number">5</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-number">5</tt><tt class="py-op">:</tt><tt class="py-number">7</tt><tt class="py-op">]</tt> </tt>
<a name="L210"></a><tt class="py-lineno">210</tt>  <tt class="py-line">                <tt class="py-name">offset</tt> <tt class="py-op">=</tt> <tt class="py-number">7</tt> </tt>
<a name="L211"></a><tt class="py-lineno">211</tt>  <tt class="py-line"> </tt>
<a name="L212"></a><tt class="py-lineno">212</tt>  <tt class="py-line">                <tt class="py-comment"># Superframe specification</tt> </tt>
<a name="L213"></a><tt class="py-lineno">213</tt>  <tt class="py-line">                <tt class="py-name">beacondata</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-name">offset</tt><tt class="py-op">:</tt><tt class="py-name">offset</tt><tt class="py-op">+</tt><tt class="py-number">2</tt><tt class="py-op">]</tt> </tt>
<a name="L214"></a><tt class="py-lineno">214</tt>  <tt class="py-line">                <tt class="py-name">offset</tt><tt class="py-op">+=</tt><tt class="py-number">2</tt> </tt>
<a name="L215"></a><tt class="py-lineno">215</tt>  <tt class="py-line">     </tt>
<a name="L216"></a><tt class="py-lineno">216</tt>  <tt class="py-line">                <tt class="py-comment"># GTS data</tt> </tt>
<a name="L217"></a><tt class="py-lineno">217</tt>  <tt class="py-line">                <tt class="py-name">beacondata</tt><tt class="py-op">[</tt><tt class="py-number">1</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-name">offset</tt><tt class="py-op">]</tt> </tt>
<a name="L218"></a><tt class="py-lineno">218</tt>  <tt class="py-line">                <tt class="py-name">offset</tt><tt class="py-op">+=</tt><tt class="py-number">1</tt> </tt>
<a name="L219"></a><tt class="py-lineno">219</tt>  <tt class="py-line">     </tt>
<a name="L220"></a><tt class="py-lineno">220</tt>  <tt class="py-line">                <tt class="py-comment"># Pending address count</tt> </tt>
<a name="L221"></a><tt class="py-lineno">221</tt>  <tt class="py-line">                <tt class="py-name">beacondata</tt><tt class="py-op">[</tt><tt class="py-number">2</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-name">offset</tt><tt class="py-op">]</tt> </tt>
<a name="L222"></a><tt class="py-lineno">222</tt>  <tt class="py-line">                <tt class="py-name">offset</tt><tt class="py-op">+=</tt><tt class="py-number">1</tt> </tt>
<a name="L223"></a><tt class="py-lineno">223</tt>  <tt class="py-line">     </tt>
<a name="L224"></a><tt class="py-lineno">224</tt>  <tt class="py-line">                <tt class="py-comment"># Protocol ID</tt> </tt>
<a name="L225"></a><tt class="py-lineno">225</tt>  <tt class="py-line">                <tt class="py-name">beacondata</tt><tt class="py-op">[</tt><tt class="py-number">3</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-name">offset</tt><tt class="py-op">]</tt> </tt>
<a name="L226"></a><tt class="py-lineno">226</tt>  <tt class="py-line">                <tt class="py-name">offset</tt><tt class="py-op">+=</tt><tt class="py-number">1</tt> </tt>
<a name="L227"></a><tt class="py-lineno">227</tt>  <tt class="py-line">     </tt>
<a name="L228"></a><tt class="py-lineno">228</tt>  <tt class="py-line">                <tt class="py-comment"># Stack Profile version</tt> </tt>
<a name="L229"></a><tt class="py-lineno">229</tt>  <tt class="py-line">                <tt class="py-name">beacondata</tt><tt class="py-op">[</tt><tt class="py-number">4</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-name">offset</tt><tt class="py-op">]</tt> </tt>
<a name="L230"></a><tt class="py-lineno">230</tt>  <tt class="py-line">                <tt class="py-name">offset</tt><tt class="py-op">+=</tt><tt class="py-number">1</tt> </tt>
<a name="L231"></a><tt class="py-lineno">231</tt>  <tt class="py-line">     </tt>
<a name="L232"></a><tt class="py-lineno">232</tt>  <tt class="py-line">                <tt class="py-comment"># Capability information</tt> </tt>
<a name="L233"></a><tt class="py-lineno">233</tt>  <tt class="py-line">                <tt class="py-name">beacondata</tt><tt class="py-op">[</tt><tt class="py-number">5</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-name">offset</tt><tt class="py-op">]</tt> </tt>
<a name="L234"></a><tt class="py-lineno">234</tt>  <tt class="py-line">                <tt class="py-name">offset</tt><tt class="py-op">+=</tt><tt class="py-number">1</tt> </tt>
<a name="L235"></a><tt class="py-lineno">235</tt>  <tt class="py-line">     </tt>
<a name="L236"></a><tt class="py-lineno">236</tt>  <tt class="py-line">                <tt class="py-comment"># Extended PAN ID</tt> </tt>
<a name="L237"></a><tt class="py-lineno">237</tt>  <tt class="py-line">                <tt class="py-name">beacondata</tt><tt class="py-op">[</tt><tt class="py-number">6</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-name">offset</tt><tt class="py-op">:</tt><tt class="py-name">offset</tt><tt class="py-op">+</tt><tt class="py-number">8</tt><tt class="py-op">]</tt> </tt>
<a name="L238"></a><tt class="py-lineno">238</tt>  <tt class="py-line">                <tt class="py-name">offset</tt><tt class="py-op">+=</tt><tt class="py-number">8</tt> </tt>
<a name="L239"></a><tt class="py-lineno">239</tt>  <tt class="py-line">     </tt>
<a name="L240"></a><tt class="py-lineno">240</tt>  <tt class="py-line">                <tt class="py-comment"># TX Offset</tt> </tt>
<a name="L241"></a><tt class="py-lineno">241</tt>  <tt class="py-line">                <tt class="py-name">beacondata</tt><tt class="py-op">[</tt><tt class="py-number">7</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-name">offset</tt><tt class="py-op">:</tt><tt class="py-name">offset</tt><tt class="py-op">+</tt><tt class="py-number">3</tt><tt class="py-op">]</tt> </tt>
<a name="L242"></a><tt class="py-lineno">242</tt>  <tt class="py-line">                <tt class="py-name">offset</tt><tt class="py-op">+=</tt><tt class="py-number">3</tt> </tt>
<a name="L243"></a><tt class="py-lineno">243</tt>  <tt class="py-line">     </tt>
<a name="L244"></a><tt class="py-lineno">244</tt>  <tt class="py-line">                <tt class="py-comment"># Update ID</tt> </tt>
<a name="L245"></a><tt class="py-lineno">245</tt>  <tt class="py-line">                <tt class="py-name">beacondata</tt><tt class="py-op">[</tt><tt class="py-number">8</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-name">offset</tt><tt class="py-op">]</tt> </tt>
<a name="L246"></a><tt class="py-lineno">246</tt>  <tt class="py-line">                <tt class="py-name">offset</tt><tt class="py-op">+=</tt><tt class="py-number">1</tt> </tt>
<a name="L247"></a><tt class="py-lineno">247</tt>  <tt class="py-line"> </tt>
<a name="L248"></a><tt class="py-lineno">248</tt>  <tt class="py-line">            <tt class="py-keyword">except</tt><tt class="py-op">:</tt> </tt>
<a name="L249"></a><tt class="py-lineno">249</tt>  <tt class="py-line">                <tt class="py-keyword">pass</tt> </tt>
<a name="L250"></a><tt class="py-lineno">250</tt>  <tt class="py-line"> </tt>
<a name="L251"></a><tt class="py-lineno">251</tt>  <tt class="py-line">            <tt id="link-50" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-50', 'pktchop', 'link-42');">pktchop</a></tt><tt class="py-op">[</tt><tt class="py-number">6</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">beacondata</tt> </tt>
<a name="L252"></a><tt class="py-lineno">252</tt>  <tt class="py-line"> </tt>
<a name="L253"></a><tt class="py-lineno">253</tt>  <tt class="py-line">        <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
<a name="L254"></a><tt class="py-lineno">254</tt>  <tt class="py-line">            <tt class="py-comment"># Not a beacon frame</tt> </tt>
<a name="L255"></a><tt class="py-lineno">255</tt>  <tt class="py-line"> </tt>
<a name="L256"></a><tt class="py-lineno">256</tt>  <tt class="py-line">            <tt class="py-comment"># DPAN</tt> </tt>
<a name="L257"></a><tt class="py-lineno">257</tt>  <tt class="py-line">            <tt id="link-51" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-51', 'pktchop', 'link-42');">pktchop</a></tt><tt class="py-op">[</tt><tt class="py-number">2</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-number">3</tt><tt class="py-op">:</tt><tt class="py-number">5</tt><tt class="py-op">]</tt> </tt>
<a name="L258"></a><tt class="py-lineno">258</tt>  <tt class="py-line">            <tt class="py-name">offset</tt> <tt class="py-op">=</tt> <tt class="py-number">5</tt> </tt>
<a name="L259"></a><tt class="py-lineno">259</tt>  <tt class="py-line">     </tt>
<a name="L260"></a><tt class="py-lineno">260</tt>  <tt class="py-line">            <tt class="py-comment"># Examine the destination addressing mode</tt> </tt>
<a name="L261"></a><tt class="py-lineno">261</tt>  <tt class="py-line">            <tt class="py-name">daddr_mask</tt> <tt class="py-op">=</tt> <tt class="py-op">(</tt><tt class="py-name">fcf</tt> <tt class="py-op">&amp;</tt> <tt id="link-52" class="py-name"><a title="killerbee.dot154decode.DOT154_FCF_DADDR_MASK" class="py-name" href="#" onclick="return doclink('link-52', 'DOT154_FCF_DADDR_MASK', 'link-5');">DOT154_FCF_DADDR_MASK</a></tt><tt class="py-op">)</tt> <tt class="py-op">&gt;&gt;</tt> <tt class="py-number">10</tt> </tt>
<a name="L262"></a><tt class="py-lineno">262</tt>  <tt class="py-line">            <tt class="py-keyword">if</tt> <tt class="py-name">daddr_mask</tt> <tt class="py-op">==</tt> <tt id="link-53" class="py-name"><a title="killerbee.dot154decode.DOT154_FCF_ADDR_EXT" class="py-name" href="#" onclick="return doclink('link-53', 'DOT154_FCF_ADDR_EXT', 'link-14');">DOT154_FCF_ADDR_EXT</a></tt><tt class="py-op">:</tt> </tt>
<a name="L263"></a><tt class="py-lineno">263</tt>  <tt class="py-line">                <tt id="link-54" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-54', 'pktchop', 'link-42');">pktchop</a></tt><tt class="py-op">[</tt><tt class="py-number">3</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-name">offset</tt><tt class="py-op">:</tt><tt class="py-name">offset</tt><tt class="py-op">+</tt><tt class="py-number">8</tt><tt class="py-op">]</tt> </tt>
<a name="L264"></a><tt class="py-lineno">264</tt>  <tt class="py-line">                <tt class="py-name">offset</tt><tt class="py-op">+=</tt><tt class="py-number">8</tt> </tt>
<a name="L265"></a><tt class="py-lineno">265</tt>  <tt class="py-line">            <tt class="py-keyword">elif</tt> <tt class="py-name">daddr_mask</tt> <tt class="py-op">==</tt> <tt id="link-55" class="py-name"><a title="killerbee.dot154decode.DOT154_FCF_ADDR_SHORT" class="py-name" href="#" onclick="return doclink('link-55', 'DOT154_FCF_ADDR_SHORT', 'link-13');">DOT154_FCF_ADDR_SHORT</a></tt><tt class="py-op">:</tt> </tt>
<a name="L266"></a><tt class="py-lineno">266</tt>  <tt class="py-line">                <tt id="link-56" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-56', 'pktchop', 'link-42');">pktchop</a></tt><tt class="py-op">[</tt><tt class="py-number">3</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-name">offset</tt><tt class="py-op">:</tt><tt class="py-name">offset</tt><tt class="py-op">+</tt><tt class="py-number">2</tt><tt class="py-op">]</tt> </tt>
<a name="L267"></a><tt class="py-lineno">267</tt>  <tt class="py-line">                <tt class="py-name">offset</tt><tt class="py-op">+=</tt><tt class="py-number">2</tt> </tt>
<a name="L268"></a><tt class="py-lineno">268</tt>  <tt class="py-line">     </tt>
<a name="L269"></a><tt class="py-lineno">269</tt>  <tt class="py-line">            <tt class="py-comment"># Examine the Intra-PAN flag</tt> </tt>
<a name="L270"></a><tt class="py-lineno">270</tt>  <tt class="py-line">            <tt class="py-keyword">if</tt> <tt class="py-op">(</tt><tt class="py-name">fcf</tt> <tt class="py-op">&amp;</tt> <tt id="link-57" class="py-name"><a title="killerbee.dot154decode.DOT154_FCF_INTRA_PAN" class="py-name" href="#" onclick="return doclink('link-57', 'DOT154_FCF_INTRA_PAN', 'link-4');">DOT154_FCF_INTRA_PAN</a></tt><tt class="py-op">)</tt> <tt class="py-op">==</tt> <tt class="py-number">0</tt><tt class="py-op">:</tt> </tt>
<a name="L271"></a><tt class="py-lineno">271</tt>  <tt class="py-line">                <tt id="link-58" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-58', 'pktchop', 'link-42');">pktchop</a></tt><tt class="py-op">[</tt><tt class="py-number">4</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-name">offset</tt><tt class="py-op">:</tt><tt class="py-name">offset</tt><tt class="py-op">+</tt><tt class="py-number">2</tt><tt class="py-op">]</tt> </tt>
<a name="L272"></a><tt class="py-lineno">272</tt>  <tt class="py-line">                <tt class="py-name">offset</tt><tt class="py-op">+=</tt><tt class="py-number">2</tt> </tt>
<a name="L273"></a><tt class="py-lineno">273</tt>  <tt class="py-line">     </tt>
<a name="L274"></a><tt class="py-lineno">274</tt>  <tt class="py-line">            <tt class="py-comment"># Examine the source addressing mode</tt> </tt>
<a name="L275"></a><tt class="py-lineno">275</tt>  <tt class="py-line">            <tt class="py-name">saddr_mask</tt> <tt class="py-op">=</tt> <tt class="py-op">(</tt><tt class="py-name">fcf</tt> <tt class="py-op">&amp;</tt> <tt id="link-59" class="py-name"><a title="killerbee.dot154decode.DOT154_FCF_SADDR_MASK" class="py-name" href="#" onclick="return doclink('link-59', 'DOT154_FCF_SADDR_MASK', 'link-7');">DOT154_FCF_SADDR_MASK</a></tt><tt class="py-op">)</tt> <tt class="py-op">&gt;&gt;</tt> <tt class="py-number">14</tt> </tt>
<a name="L276"></a><tt class="py-lineno">276</tt>  <tt class="py-line">            <tt class="py-keyword">if</tt> <tt class="py-name">daddr_mask</tt> <tt class="py-op">==</tt> <tt id="link-60" class="py-name"><a title="killerbee.dot154decode.DOT154_FCF_ADDR_EXT" class="py-name" href="#" onclick="return doclink('link-60', 'DOT154_FCF_ADDR_EXT', 'link-14');">DOT154_FCF_ADDR_EXT</a></tt><tt class="py-op">:</tt> </tt>
<a name="L277"></a><tt class="py-lineno">277</tt>  <tt class="py-line">                <tt id="link-61" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-61', 'pktchop', 'link-42');">pktchop</a></tt><tt class="py-op">[</tt><tt class="py-number">5</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-name">offset</tt><tt class="py-op">:</tt><tt class="py-name">offset</tt><tt class="py-op">+</tt><tt class="py-number">8</tt><tt class="py-op">]</tt> </tt>
<a name="L278"></a><tt class="py-lineno">278</tt>  <tt class="py-line">                <tt class="py-name">offset</tt><tt class="py-op">+=</tt><tt class="py-number">8</tt> </tt>
<a name="L279"></a><tt class="py-lineno">279</tt>  <tt class="py-line">            <tt class="py-keyword">elif</tt> <tt class="py-name">daddr_mask</tt> <tt class="py-op">==</tt> <tt id="link-62" class="py-name"><a title="killerbee.dot154decode.DOT154_FCF_ADDR_SHORT" class="py-name" href="#" onclick="return doclink('link-62', 'DOT154_FCF_ADDR_SHORT', 'link-13');">DOT154_FCF_ADDR_SHORT</a></tt><tt class="py-op">:</tt> </tt>
<a name="L280"></a><tt class="py-lineno">280</tt>  <tt class="py-line">                <tt id="link-63" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-63', 'pktchop', 'link-42');">pktchop</a></tt><tt class="py-op">[</tt><tt class="py-number">5</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-name">offset</tt><tt class="py-op">:</tt><tt class="py-name">offset</tt><tt class="py-op">+</tt><tt class="py-number">2</tt><tt class="py-op">]</tt> </tt>
<a name="L281"></a><tt class="py-lineno">281</tt>  <tt class="py-line">                <tt class="py-name">offset</tt><tt class="py-op">+=</tt><tt class="py-number">2</tt> </tt>
<a name="L282"></a><tt class="py-lineno">282</tt>  <tt class="py-line"> </tt>
<a name="L283"></a><tt class="py-lineno">283</tt>  <tt class="py-line">        <tt class="py-comment"># Append remaining payload</tt> </tt>
<a name="L284"></a><tt class="py-lineno">284</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-name">offset</tt> <tt class="py-op">&lt;</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">packet</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L285"></a><tt class="py-lineno">285</tt>  <tt class="py-line">            <tt id="link-64" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-64', 'pktchop', 'link-42');">pktchop</a></tt><tt class="py-op">[</tt><tt class="py-number">7</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-name">offset</tt><tt class="py-op">:</tt><tt class="py-op">]</tt> </tt>
<a name="L286"></a><tt class="py-lineno">286</tt>  <tt class="py-line">     </tt>
<a name="L287"></a><tt class="py-lineno">287</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt id="link-65" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-65', 'pktchop', 'link-42');">pktchop</a></tt> </tt>
</div><a name="L288"></a><tt class="py-lineno">288</tt>  <tt class="py-line"> </tt>
<a name="L289"></a><tt class="py-lineno">289</tt>  <tt class="py-line"> </tt>
<a name="Dot154PacketParser.hdrlen"></a><div id="Dot154PacketParser.hdrlen-def"><a name="L290"></a><tt class="py-lineno">290</tt> <a class="py-toggle" href="#" id="Dot154PacketParser.hdrlen-toggle" onclick="return toggle('Dot154PacketParser.hdrlen');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="killerbee.dot154decode.Dot154PacketParser-class.html#hdrlen">hdrlen</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">packet</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="Dot154PacketParser.hdrlen-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Dot154PacketParser.hdrlen-expanded"><a name="L291"></a><tt class="py-lineno">291</tt>  <tt class="py-line">        <tt class="py-docstring">'''</tt> </tt>
<a name="L292"></a><tt class="py-lineno">292</tt>  <tt class="py-line"><tt class="py-docstring">        Returns the length of the 802.15.4 header.</tt> </tt>
<a name="L293"></a><tt class="py-lineno">293</tt>  <tt class="py-line"><tt class="py-docstring">        @type packet: String</tt> </tt>
<a name="L294"></a><tt class="py-lineno">294</tt>  <tt class="py-line"><tt class="py-docstring">        @param packet: Packet contents to evaluate for header length.</tt> </tt>
<a name="L295"></a><tt class="py-lineno">295</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype: Int</tt> </tt>
<a name="L296"></a><tt class="py-lineno">296</tt>  <tt class="py-line"><tt class="py-docstring">        @return: Length of the 802.15.4 header.</tt> </tt>
<a name="L297"></a><tt class="py-lineno">297</tt>  <tt class="py-line"><tt class="py-docstring">        '''</tt> </tt>
<a name="L298"></a><tt class="py-lineno">298</tt>  <tt class="py-line"> </tt>
<a name="L299"></a><tt class="py-lineno">299</tt>  <tt class="py-line">        <tt class="py-comment"># Minimum size is 11 (2 bytes FCF + 1 byte SEQ + 2 bytes DPAN +</tt> </tt>
<a name="L300"></a><tt class="py-lineno">300</tt>  <tt class="py-line">        <tt class="py-comment">#  2 bytes DstAddr + 2 bytes SPAN + 2 bytes SrcAddr)</tt> </tt>
<a name="L301"></a><tt class="py-lineno">301</tt>  <tt class="py-line">        <tt class="py-comment"># XXX Need to validate this logic based on specification</tt> </tt>
<a name="L302"></a><tt class="py-lineno">302</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-op">(</tt><tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">packet</tt><tt class="py-op">)</tt> <tt class="py-op">&lt;</tt> <tt class="py-number">9</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
<a name="L303"></a><tt class="py-lineno">303</tt>  <tt class="py-line">            <tt class="py-keyword">raise</tt> <tt class="py-name">Exception</tt><tt class="py-op">(</tt><tt class="py-string">"Packet too small, %d bytes."</tt> <tt class="py-op">%</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">packet</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
<a name="L304"></a><tt class="py-lineno">304</tt>  <tt class="py-line"> </tt>
<a name="L305"></a><tt class="py-lineno">305</tt>  <tt class="py-line">        <tt class="py-comment"># Start with minimum size, increase as needed based on FCF flags</tt> </tt>
<a name="L306"></a><tt class="py-lineno">306</tt>  <tt class="py-line">        <tt class="py-name">plen</tt> <tt class="py-op">=</tt> <tt class="py-number">9</tt> </tt>
<a name="L307"></a><tt class="py-lineno">307</tt>  <tt class="py-line"> </tt>
<a name="L308"></a><tt class="py-lineno">308</tt>  <tt class="py-line">        <tt class="py-comment"># Byte swap</tt> </tt>
<a name="L309"></a><tt class="py-lineno">309</tt>  <tt class="py-line">        <tt class="py-name">fcf</tt> <tt class="py-op">=</tt> <tt class="py-name">struct</tt><tt class="py-op">.</tt><tt class="py-name">unpack</tt><tt class="py-op">(</tt><tt class="py-string">"&lt;H"</tt><tt class="py-op">,</tt><tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">:</tt><tt class="py-number">2</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt> </tt>
<a name="L310"></a><tt class="py-lineno">310</tt>  <tt class="py-line"> </tt>
<a name="L311"></a><tt class="py-lineno">311</tt>  <tt class="py-line">        <tt class="py-comment"># Examine the destination addressing mode</tt> </tt>
<a name="L312"></a><tt class="py-lineno">312</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-op">(</tt><tt class="py-name">fcf</tt> <tt class="py-op">&amp;</tt> <tt id="link-66" class="py-name"><a title="killerbee.dot154decode.DOT154_FCF_DADDR_MASK" class="py-name" href="#" onclick="return doclink('link-66', 'DOT154_FCF_DADDR_MASK', 'link-5');">DOT154_FCF_DADDR_MASK</a></tt><tt class="py-op">)</tt> <tt class="py-op">&gt;&gt;</tt> <tt class="py-number">10</tt> <tt class="py-op">==</tt> <tt id="link-67" class="py-name"><a title="killerbee.dot154decode.DOT154_FCF_ADDR_EXT" class="py-name" href="#" onclick="return doclink('link-67', 'DOT154_FCF_ADDR_EXT', 'link-14');">DOT154_FCF_ADDR_EXT</a></tt><tt class="py-op">:</tt> </tt>
<a name="L313"></a><tt class="py-lineno">313</tt>  <tt class="py-line">            <tt class="py-name">plen</tt> <tt class="py-op">+=</tt> <tt class="py-number">6</tt>   <tt class="py-comment"># 8-byte addressing is in use, increasing addr 6 bytes</tt> </tt>
<a name="L314"></a><tt class="py-lineno">314</tt>  <tt class="py-line"> </tt>
<a name="L315"></a><tt class="py-lineno">315</tt>  <tt class="py-line">        <tt class="py-comment"># Examine the source addressing mode</tt> </tt>
<a name="L316"></a><tt class="py-lineno">316</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-op">(</tt><tt class="py-name">fcf</tt> <tt class="py-op">&amp;</tt> <tt id="link-68" class="py-name"><a title="killerbee.dot154decode.DOT154_FCF_SADDR_MASK" class="py-name" href="#" onclick="return doclink('link-68', 'DOT154_FCF_SADDR_MASK', 'link-7');">DOT154_FCF_SADDR_MASK</a></tt><tt class="py-op">)</tt> <tt class="py-op">&gt;&gt;</tt> <tt class="py-number">14</tt> <tt class="py-op">==</tt> <tt id="link-69" class="py-name"><a title="killerbee.dot154decode.DOT154_FCF_ADDR_EXT" class="py-name" href="#" onclick="return doclink('link-69', 'DOT154_FCF_ADDR_EXT', 'link-14');">DOT154_FCF_ADDR_EXT</a></tt><tt class="py-op">:</tt> </tt>
<a name="L317"></a><tt class="py-lineno">317</tt>  <tt class="py-line">            <tt class="py-name">plen</tt> <tt class="py-op">+=</tt> <tt class="py-number">6</tt>   <tt class="py-comment"># 8-byte addressing is in use, increasing addr 6 bytes</tt> </tt>
<a name="L318"></a><tt class="py-lineno">318</tt>  <tt class="py-line"> </tt>
<a name="L319"></a><tt class="py-lineno">319</tt>  <tt class="py-line">        <tt class="py-comment"># Examine the Intra-PAN flag</tt> </tt>
<a name="L320"></a><tt class="py-lineno">320</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-op">(</tt><tt class="py-name">fcf</tt> <tt class="py-op">&amp;</tt> <tt id="link-70" class="py-name"><a title="killerbee.dot154decode.DOT154_FCF_INTRA_PAN" class="py-name" href="#" onclick="return doclink('link-70', 'DOT154_FCF_INTRA_PAN', 'link-4');">DOT154_FCF_INTRA_PAN</a></tt><tt class="py-op">)</tt> <tt class="py-op">==</tt> <tt class="py-number">0</tt><tt class="py-op">:</tt> </tt>
<a name="L321"></a><tt class="py-lineno">321</tt>  <tt class="py-line">            <tt class="py-name">plen</tt> <tt class="py-op">+=</tt> <tt class="py-number">2</tt>   <tt class="py-comment"># Intra-PAN is false, source PAN 2-bytes is present</tt> </tt>
<a name="L322"></a><tt class="py-lineno">322</tt>  <tt class="py-line"> </tt>
<a name="L323"></a><tt class="py-lineno">323</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">plen</tt> </tt>
</div><a name="L324"></a><tt class="py-lineno">324</tt>  <tt class="py-line"> </tt>
<a name="Dot154PacketParser.payloadlen"></a><div id="Dot154PacketParser.payloadlen-def"><a name="L325"></a><tt class="py-lineno">325</tt> <a class="py-toggle" href="#" id="Dot154PacketParser.payloadlen-toggle" onclick="return toggle('Dot154PacketParser.payloadlen');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="killerbee.dot154decode.Dot154PacketParser-class.html#payloadlen">payloadlen</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">packet</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="Dot154PacketParser.payloadlen-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Dot154PacketParser.payloadlen-expanded"><a name="L326"></a><tt class="py-lineno">326</tt>  <tt class="py-line">        <tt class="py-docstring">'''</tt> </tt>
<a name="L327"></a><tt class="py-lineno">327</tt>  <tt class="py-line"><tt class="py-docstring">        Returns the length of the 802.15.4 payload.</tt> </tt>
<a name="L328"></a><tt class="py-lineno">328</tt>  <tt class="py-line"><tt class="py-docstring">        @type packet: String</tt> </tt>
<a name="L329"></a><tt class="py-lineno">329</tt>  <tt class="py-line"><tt class="py-docstring">        @param packet: Packet contents to evaluate for header length.</tt> </tt>
<a name="L330"></a><tt class="py-lineno">330</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype: Int</tt> </tt>
<a name="L331"></a><tt class="py-lineno">331</tt>  <tt class="py-line"><tt class="py-docstring">        @return: Length of the 802.15.4 payload.</tt> </tt>
<a name="L332"></a><tt class="py-lineno">332</tt>  <tt class="py-line"><tt class="py-docstring">        '''</tt> </tt>
<a name="L333"></a><tt class="py-lineno">333</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">len</tt><tt class="py-op">(</tt><tt class="py-name">packet</tt><tt class="py-op">)</tt> <tt class="py-op">-</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-71" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.hdrlen
killerbee.zigbeedecode.ZigBeeAPSPacketParser.hdrlen
killerbee.zigbeedecode.ZigBeeNWKPacketParser.hdrlen" class="py-name" href="#" onclick="return doclink('link-71', 'hdrlen', 'link-36');">hdrlen</a></tt><tt class="py-op">(</tt><tt class="py-name">packet</tt><tt class="py-op">)</tt> </tt>
</div><a name="L334"></a><tt class="py-lineno">334</tt>  <tt class="py-line"> </tt>
<a name="Dot154PacketParser.nonce"></a><div id="Dot154PacketParser.nonce-def"><a name="L335"></a><tt class="py-lineno">335</tt> <a class="py-toggle" href="#" id="Dot154PacketParser.nonce-toggle" onclick="return toggle('Dot154PacketParser.nonce');">-</a><tt class="py-line">    <tt class="py-keyword">def</tt> <a class="py-def-name" href="killerbee.dot154decode.Dot154PacketParser-class.html#nonce">nonce</a><tt class="py-op">(</tt><tt class="py-param">self</tt><tt class="py-op">,</tt> <tt class="py-param">packet</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
</div><div id="Dot154PacketParser.nonce-collapsed" style="display:none;" pad="+++" indent="++++++++"></div><div id="Dot154PacketParser.nonce-expanded"><a name="L336"></a><tt class="py-lineno">336</tt>  <tt class="py-line">        <tt class="py-docstring">'''</tt> </tt>
<a name="L337"></a><tt class="py-lineno">337</tt>  <tt class="py-line"><tt class="py-docstring">        Returns the nonce of the 802.15.4 packet.  Returns empty string for</tt> </tt>
<a name="L338"></a><tt class="py-lineno">338</tt>  <tt class="py-line"><tt class="py-docstring">        unencrypted frames.</tt> </tt>
<a name="L339"></a><tt class="py-lineno">339</tt>  <tt class="py-line"><tt class="py-docstring">        @type packet: String</tt> </tt>
<a name="L340"></a><tt class="py-lineno">340</tt>  <tt class="py-line"><tt class="py-docstring">        @param packet: Packet contents to evaluate for nonce.</tt> </tt>
<a name="L341"></a><tt class="py-lineno">341</tt>  <tt class="py-line"><tt class="py-docstring">        @rtype: String</tt> </tt>
<a name="L342"></a><tt class="py-lineno">342</tt>  <tt class="py-line"><tt class="py-docstring">        @return: Nonce, empty when the frame is not encrypted.</tt> </tt>
<a name="L343"></a><tt class="py-lineno">343</tt>  <tt class="py-line"><tt class="py-docstring">        '''</tt> </tt>
<a name="L344"></a><tt class="py-lineno">344</tt>  <tt class="py-line"> </tt>
<a name="L345"></a><tt class="py-lineno">345</tt>  <tt class="py-line">        <tt class="py-comment"># Byte swap</tt> </tt>
<a name="L346"></a><tt class="py-lineno">346</tt>  <tt class="py-line">        <tt class="py-name">fcf</tt> <tt class="py-op">=</tt> <tt class="py-name">struct</tt><tt class="py-op">.</tt><tt class="py-name">unpack</tt><tt class="py-op">(</tt><tt class="py-string">"&lt;H"</tt><tt class="py-op">,</tt><tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">:</tt><tt class="py-number">2</tt><tt class="py-op">]</tt><tt class="py-op">)</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt> </tt>
<a name="L347"></a><tt class="py-lineno">347</tt>  <tt class="py-line">         </tt>
<a name="L348"></a><tt class="py-lineno">348</tt>  <tt class="py-line">        <tt class="py-keyword">if</tt> <tt class="py-op">(</tt><tt class="py-name">fcf</tt> <tt class="py-op">&amp;</tt> <tt id="link-72" class="py-name"><a title="killerbee.dot154decode.DOT154_FCF_SEC_EN" class="py-name" href="#" onclick="return doclink('link-72', 'DOT154_FCF_SEC_EN', 'link-1');">DOT154_FCF_SEC_EN</a></tt><tt class="py-op">)</tt> <tt class="py-op">==</tt> <tt class="py-number">0</tt><tt class="py-op">:</tt> </tt>
<a name="L349"></a><tt class="py-lineno">349</tt>  <tt class="py-line">            <tt class="py-comment"># Packet is not encrypted</tt> </tt>
<a name="L350"></a><tt class="py-lineno">350</tt>  <tt class="py-line">            <tt class="py-keyword">return</tt> <tt class="py-string">""</tt> </tt>
<a name="L351"></a><tt class="py-lineno">351</tt>  <tt class="py-line"> </tt>
<a name="L352"></a><tt class="py-lineno">352</tt>  <tt class="py-line">        <tt class="py-comment"># Nonce formation is Src Addr || Frame Counter || Security Level</tt> </tt>
<a name="L353"></a><tt class="py-lineno">353</tt>  <tt class="py-line">        <tt class="py-name">pchop</tt> <tt class="py-op">=</tt> <tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-73" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.pktchop
killerbee.zigbeedecode.ZigBeeAPSPacketParser.pktchop
killerbee.zigbeedecode.ZigBeeNWKPacketParser.pktchop" class="py-name" href="#" onclick="return doclink('link-73', 'pktchop', 'link-42');">pktchop</a></tt><tt class="py-op">(</tt><tt class="py-name">packet</tt><tt class="py-op">)</tt> </tt>
<a name="L354"></a><tt class="py-lineno">354</tt>  <tt class="py-line"> </tt>
<a name="L355"></a><tt class="py-lineno">355</tt>  <tt class="py-line">        <tt class="py-comment"># SA is the 5th list element, reverse it</tt> </tt>
<a name="L356"></a><tt class="py-lineno">356</tt>  <tt class="py-line">        <tt class="py-name">noncep1</tt> <tt class="py-op">=</tt> <tt class="py-name">pchop</tt><tt class="py-op">[</tt><tt class="py-number">5</tt><tt class="py-op">]</tt><tt class="py-op">[</tt><tt class="py-op">:</tt><tt class="py-op">:</tt><tt class="py-op">-</tt><tt class="py-number">1</tt><tt class="py-op">]</tt> </tt>
<a name="L357"></a><tt class="py-lineno">357</tt>  <tt class="py-line"> </tt>
<a name="L358"></a><tt class="py-lineno">358</tt>  <tt class="py-line">        <tt class="py-comment"># Retrieve the data payload from the packet contents</tt> </tt>
<a name="L359"></a><tt class="py-lineno">359</tt>  <tt class="py-line">        <tt class="py-name">encpayload</tt> <tt class="py-op">=</tt> <tt class="py-name">packet</tt><tt class="py-op">[</tt><tt class="py-op">-</tt><tt class="py-name">self</tt><tt class="py-op">.</tt><tt id="link-74" class="py-name"><a title="killerbee.dot154decode.Dot154PacketParser.payloadlen
killerbee.zigbeedecode.ZigBeeAPSPacketParser.payloadlen
killerbee.zigbeedecode.ZigBeeNWKPacketParser.payloadlen" class="py-name" href="#" onclick="return doclink('link-74', 'payloadlen', 'link-27');">payloadlen</a></tt><tt class="py-op">(</tt><tt class="py-name">packet</tt><tt class="py-op">)</tt><tt class="py-op">:</tt><tt class="py-op">]</tt> </tt>
<a name="L360"></a><tt class="py-lineno">360</tt>  <tt class="py-line"> </tt>
<a name="L361"></a><tt class="py-lineno">361</tt>  <tt class="py-line">        <tt class="py-comment"># First byte of encrypted payload is the security level</tt> </tt>
<a name="L362"></a><tt class="py-lineno">362</tt>  <tt class="py-line">        <tt class="py-name">noncep3</tt> <tt class="py-op">=</tt> <tt class="py-name">encpayload</tt><tt class="py-op">[</tt><tt class="py-number">0</tt><tt class="py-op">]</tt> </tt>
<a name="L363"></a><tt class="py-lineno">363</tt>  <tt class="py-line"> </tt>
<a name="L364"></a><tt class="py-lineno">364</tt>  <tt class="py-line">        <tt class="py-comment"># The next 4 bytes of the encrypted payload is the frame counter, rev</tt> </tt>
<a name="L365"></a><tt class="py-lineno">365</tt>  <tt class="py-line">        <tt class="py-name">noncep2</tt> <tt class="py-op">=</tt> <tt class="py-name">encpayload</tt><tt class="py-op">[</tt><tt class="py-number">1</tt><tt class="py-op">:</tt><tt class="py-number">5</tt><tt class="py-op">]</tt><tt class="py-op">[</tt><tt class="py-op">:</tt><tt class="py-op">:</tt><tt class="py-op">-</tt><tt class="py-number">1</tt><tt class="py-op">]</tt> </tt>
<a name="L366"></a><tt class="py-lineno">366</tt>  <tt class="py-line">         </tt>
<a name="L367"></a><tt class="py-lineno">367</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">noncep1</tt> <tt class="py-op">+</tt> <tt class="py-name">noncep2</tt> <tt class="py-op">+</tt> <tt class="py-name">noncep3</tt> </tt>
</div></div><a name="L368"></a><tt class="py-lineno">368</tt>  <tt class="py-line"> </tt><script type="text/javascript">
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